Date | Radio flux 10.7 cm | SESC Sunspot number | Sunspot area 10E-6 | New regions | GOES15 X-ray Bkgd flux | Flares | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
X-ray | Optical | |||||||||||
C | M | X | S | 1 | 2 | 3 | ||||||
2024-03-21 | 197 | 141 | 1060 | 2 | * | 3 | 0 | 0 | 4 | 0 | 0 | 0 |
2024-03-22 | 198 | 171 | 1080 | 1 | * | 15 | 2 | 0 | 18 | 1 | 1 | 0 |
2024-03-23 | 209 | 146 | 1280 | 1 | * | 5 | 12 | 1 | 9 | 3 | 3 | 0 |
2024-03-24 | 195 | 145 | 1230 | 1 | * | 12 | 9 | 0 | 12 | 6 | 2 | 0 |
2024-03-25 | 190 | 163 | 1540 | 1 | * | 10 | 1 | 0 | 20 | 1 | 0 | 0 |
2024-03-26 | 178 | 149 | 1480 | 0 | * | 16 | 6 | 0 | 9 | 0 | 0 | 0 |
2024-03-27 | 175 | 114 | 1270 | 0 | * | 13 | 2 | 0 | 27 | 2 | 0 | 0 |
2024-03-28 | 173 | 101 | 1150 | 0 | * | 8 | 3 | 1 | 6 | 3 | 1 | 1 |
2024-03-29 | 167 | 79 | 1090 | 0 | * | 12 | 2 | 0 | 15 | 1 | 0 | 0 |
2024-03-30 | 140 | 60 | 930 | 1 | * | 8 | 1 | 0 | 7 | 0 | 0 | 0 |
2024-03-31 | 134 | 50 | 110 | 1 | * | 6 | 0 | 0 | 0 | 0 | 0 | 0 |
2024-04-01 | 125 | 50 | 112 | 1 | * | 0 | 1 | 0 | 2 | 0 | 0 | 0 |
2024-04-02 | 113 | 35 | 76 | 1 | * | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
2024-04-03 | 112 | 45 | 101 | 1 | * | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
2024-04-04 | 114 | 47 | 170 | 1 | * | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
2024-04-05 | 121 | 81 | 310 | 3 | * | 5 | 0 | 0 | 0 | 0 | 0 | 0 |
2024-04-06 | 123 | 71 | 400 | 1 | * | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
2024-04-07 | 125 | 79 | 380 | 0 | * | 2 | 0 | 0 | 1 | 0 | 0 | 0 |
2024-04-08 | 125 | 79 | 470 | 1 | * | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
2024-04-09 | 124 | 64 | 405 | 0 | * | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
2024-04-10 | 131 | 54 | 410 | 1 | * | 11 | 0 | 0 | 3 | 0 | 0 | 0 |
2024-04-11 | 144 | 81 | 560 | 1 | * | 10 | 1 | 0 | 4 | 0 | 0 | 0 |
2024-04-12 | 152 | 83 | 570 | 0 | * | 8 | 0 | 0 | 7 | 0 | 0 | 0 |
2024-04-13 | 161 | 115 | 750 | 2 | * | 8 | 1 | 0 | 3 | 0 | 0 | 0 |
2024-04-14 | 178 | 152 | 770 | 3 | * | 13 | 1 | 0 | 12 | 1 | 0 | 0 |
2024-04-15 | 192 | 193 | 1070 | 2 | * | 13 | 8 | 0 | 12 | 5 | 0 | 0 |
2024-04-16 | 199 | 176 | 1200 | 1 | * | 4 | 1 | 0 | 0 | 0 | 1 | 0 |
2024-04-17 | 217 | 199 | 1150 | 2 | * | 12 | 1 | 0 | 9 | 1 | 1 | 0 |
2024-04-18 | 227 | 247 | 1380 | 2 | * | 3 | 3 | 0 | 11 | 2 | 0 | 0 |
2024-04-19 | 213 | 243 | 1120 | 3 | * | 11 | 2 | 0 | 11 | 1 | 0 | 0 |
Average/Total | 162 | 114 | 787 | 34 | 213 | 57 | 2 | 203 | 27 | 9 | 1 |
Space weather
Solar wind speed | Solar wind magnetic fields | Noon 10.7cm radio flux | ||||
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Update |
Update |
Update |
ALERT |
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Geomagnetic K-index of 7 |
Issued: 2024-04-19 19.52 UTC |
Geomagnetic K-index of 7 Threshold Reached: 2024 Apr 19 1951 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G3 - Strong Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. |
WARNING |
---|
Geomagnetic K-index of 7 or greater expected |
Issued: 2024-04-19 19.51 UTC |
Geomagnetic K-index of 7 or greater expected Valid From: 2024 Apr 19 1950 UTC Valid To: 2024 Apr 19 2359 UTC Warning Condition: Onset NOAA Scale: G3 or greater Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. |
WARNING |
---|
Geomagnetic K-Index of 6 expected |
Issued: 2024-04-19 19.42 UTC |
Geomagnetic K-Index of 6 expected Valid From: 2024 Apr 19 1939 UTC Valid To: 2024 Apr 19 2359 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
ALERT |
---|
Geomagnetic K-index of 6 |
Issued: 2024-04-19 19.40 UTC |
Geomagnetic K-index of 6 Threshold Reached: 2024 Apr 19 1935 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
WARNING |
---|
Geomagnetic K-Index of 6 expected |
Issued: 2024-04-19 19.40 UTC |
Geomagnetic K-Index of 6 expected Valid From: 2024 Apr 19 1939 UTC Valid To: 2024 Apr 19 2359 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
ALERT |
---|
Geomagnetic K-index of 5 |
Issued: 2024-04-19 19.20 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Apr 19 1915 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-04-19 17.55 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4589 Valid From: 2024 Apr 19 0650 UTC Now Valid Until: 2024 Apr 20 0600 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
---|
Geomagnetic K-index of 5 |
Issued: 2024-04-19 15.52 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Apr 19 1550 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-04-19 14.16 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1866 Valid From: 2024 Apr 19 0900 UTC Now Valid Until: 2024 Apr 19 2359 UTC Warning Condition: persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
---|
Geomagnetic K-index of 5 |
Issued: 2024-04-19 14.15 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Apr 19 1414 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-04-19 09.00 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Apr 19 0900 UTC Valid To: 2024 Apr 19 1500 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
---|
Geomagnetic K-index of 4 |
Issued: 2024-04-19 07.50 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Apr 19 0745 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-19 06.48 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 19 0650 UTC Valid To: 2024 Apr 19 1800 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
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Geomagnetic K-Index of 6 expected |
Issued: 2024-04-16 23.09 UTC |
Geomagnetic K-Index of 6 expected Valid From: 2024 Apr 16 2309 UTC Valid To: 2024 Apr 17 0300 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-04-16 22.55 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1864 Valid From: 2024 Apr 16 1909 UTC Now Valid Until: 2024 Apr 17 0600 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-04-16 22.54 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4587 Valid From: 2024 Apr 15 2306 UTC Now Valid Until: 2024 Apr 17 0900 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
---|
Geomagnetic K-index of 5 |
Issued: 2024-04-16 22.45 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Apr 16 2239 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-04-16 21.23 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 17: None (Below G1) Apr 18: G1 (Minor) Apr 19: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
---|
Geomagnetic K-index of 5 |
Issued: 2024-04-16 19.12 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Apr 16 1910 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-04-16 19.09 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Apr 16 1909 UTC Valid To: 2024 Apr 16 2359 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-04-16 14.24 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4586 Valid From: 2024 Apr 15 2306 UTC Now Valid Until: 2024 Apr 16 2359 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-04-16 11.08 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Apr 16 1108 UTC Valid To: 2024 Apr 16 1500 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-04-16 05.56 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4585 Valid From: 2024 Apr 15 2306 UTC Now Valid Until: 2024 Apr 16 1500 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
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Geomagnetic K-index of 4 |
Issued: 2024-04-16 01.00 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Apr 16 0053 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-04-15 23.06 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 15 2306 UTC Valid To: 2024 Apr 16 0600 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-04-13 21.10 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 14: G1 (Minor) Apr 15: G1 (Minor) Apr 16: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-04-12 21.12 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 13: None (Below G1) Apr 14: G1 (Minor) Apr 15: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
SUMMARY |
---|
X-ray Event exceeded M5 |
Issued: 2024-04-11 17.27 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Apr 11 1652 UTC Maximum Time: 2024 Apr 11 1706 UTC End Time: 2024 Apr 11 1711 UTC X-ray Class: M5.4 Location: S15E90 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. |
ALERT |
---|
Type IV Radio Emission |
Issued: 2024-04-11 17.14 UTC |
Type IV Radio Emission Begin Time: 2024 Apr 11 1659 UTC Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms. |
ALERT |
---|
X-Ray Flux exceeded M5 |
Issued: 2024-04-11 17.07 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Apr 11 1705 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-09 05.34 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 09 0533 UTC Valid To: 2024 Apr 09 1200 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-08 05.21 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 08 0520 UTC Valid To: 2024 Apr 08 1500 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-06 02.03 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 06 0205 UTC Valid To: 2024 Apr 06 1200 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
CANCEL WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-04-05 18.06 UTC |
Geomagnetic Storm Category G1 Predicted Cancel Serial Number: 994 Original Issue Time: 2024 Apr 02 1926 UTC Comment: Conditions no longer meet watch criteria. Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-05 05.55 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4580 Valid From: 2024 Apr 04 1138 UTC Now Valid Until: 2024 Apr 05 2359 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
---|
Geomagnetic K-index of 4 |
Issued: 2024-04-05 00.02 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Apr 04 2359 UTC Synoptic Period: 2100-0000 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
EXTENDED WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-04 22.56 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4579 Valid From: 2024 Apr 04 1138 UTC Now Valid Until: 2024 Apr 05 0600 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-04 11.39 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 04 1138 UTC Valid To: 2024 Apr 04 2359 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-03 02.10 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 03 0210 UTC Valid To: 2024 Apr 03 0600 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-04-02 19.26 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 03: None (Below G1) Apr 04: G1 (Minor) Apr 05: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-02 11.03 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 02 1102 UTC Valid To: 2024 Apr 02 1800 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-04-01 18.08 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 02: None (Below G1) Apr 03: None (Below G1) Apr 04: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
---|
Geomagnetic K-index of 4 |
Issued: 2024-04-01 08.03 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Apr 01 0803 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-04-01 07.39 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Apr 01 0740 UTC Valid To: 2024 Apr 01 1500 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
---|
Geomagnetic K-index of 4 |
Issued: 2024-03-31 03.00 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 31 0158 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-03-31 01.48 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Mar 31 0147 UTC Valid To: 2024 Mar 31 1800 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
SUMMARY |
---|
X-ray Event exceeded M5 |
Issued: 2024-03-30 22.24 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Mar 30 2101 UTC Maximum Time: 2024 Mar 30 2116 UTC End Time: 2024 Mar 30 2215 UTC X-ray Class: M9.4 Location: S13W88 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. |
ALERT |
---|
X-Ray Flux exceeded M5 |
Issued: 2024-03-30 21.16 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 30 2114 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. |
SUMMARY |
---|
X-ray Event exceeded M5 |
Issued: 2024-03-28 23.37 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Mar 28 2029 UTC Maximum Time: 2024 Mar 28 2056 UTC End Time: 2024 Mar 28 2101 UTC X-ray Class: X1.1 Optical Class: 3b Location: S14W61 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. |
SUMMARY |
---|
X-ray Event exceeded M5 |
Issued: 2024-03-28 21.12 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Mar 28 2029 UTC Maximum Time: 2024 Mar 28 2056 UTC End Time: 2024 Mar 28 2101 UTC X-ray Class: X1.1 Optical Class: 3b Location: S14W61 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. |
ALERT |
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X-Ray Flux exceeded M5 |
Issued: 2024-03-28 20.45 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 28 2041 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. |
SUMMARY |
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X-ray Event exceeded M5 |
Issued: 2024-03-28 16.33 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Mar 28 1540 UTC Maximum Time: 2024 Mar 28 1556 UTC End Time: 2024 Mar 28 1603 UTC X-ray Class: M6.1 Optical Class: 1n Location: S13W56 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. |
ALERT |
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X-Ray Flux exceeded M5 |
Issued: 2024-03-28 16.00 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 28 1556 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. |
SUMMARY |
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X-ray Event exceeded M5 |
Issued: 2024-03-28 06.45 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Mar 28 0616 UTC Maximum Time: 2024 Mar 28 0629 UTC End Time: 2024 Mar 28 0636 UTC X-ray Class: M7.0 Location: S13W52 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. |
ALERT |
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X-Ray Flux exceeded M5 |
Issued: 2024-03-28 06.29 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 28 0627 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-26 02.51 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4573 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 26 0900 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
SUMMARY |
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Proton Event 10MeV Integral Flux exceeded 10pfu |
Issued: 2024-03-26 01.30 UTC |
Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2024 Mar 23 0815 UTC Maximum Time: 2024 Mar 23 1820 UTC End Time: 2024 Mar 25 1515 UTC Maximum 10MeV Flux: 956 pfu NOAA Scale: S2 - Moderate |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-25 19.12 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4572 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 26 0300 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
EXTENDED WARNING |
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Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-03-25 11.53 UTC |
Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 553 Valid From: 2024 Mar 23 0617 UTC Now Valid Until: 2024 Mar 25 2359 UTC Warning Condition: Persistence Predicted NOAA Scale: S1 - Minor Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-25 08.56 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4571 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 25 2100 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-25 08.56 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1861 Valid From: 2024 Mar 23 2036 UTC Now Valid Until: 2024 Mar 25 1800 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-Index of 6 expected |
Issued: 2024-03-25 08.56 UTC |
Geomagnetic K-Index of 6 expected Extension to Serial Number: 512 Valid From: 2024 Mar 24 1435 UTC Now Valid Until: 2024 Mar 25 1500 UTC Warning Condition: persistence Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
SUMMARY |
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10cm Radio Burst |
Issued: 2024-03-25 07.20 UTC |
10cm Radio Burst Begin Time: 2024 Mar 25 0643 UTC Maximum Time: 2024 Mar 25 0643 UTC End Time: 2024 Mar 25 0645 UTC Duration: 2 minutes Peak Flux: 310 sfu Latest Penticton Noon Flux: 195 sfu Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. |
SUMMARY |
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Proton Event 10MeV Integral Flux exceeded 100pfu |
Issued: 2024-03-25 07.01 UTC |
Proton Event 10MeV Integral Flux exceeded 100pfu Begin Time: 2024 Mar 23 1405 UTC Maximum Time: 2024 Mar 23 1820 UTC End Time: 2024 Mar 24 1945 UTC Maximum 10MeV Flux: 956 pfu NOAA Scale: S2 - Moderate |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-25 05.24 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 25 0523 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-03-24 23.36 UTC |
Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 552 Valid From: 2024 Mar 23 0617 UTC Now Valid Until: 2024 Mar 25 1200 UTC Warning Condition: Persistence Predicted NOAA Scale: S1 - Minor Comment: This is an extension of the 10 MeV > 10pfu (S1) warning condition in response to continued flux above the S1 threshold. Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. |
ALERT |
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Geomagnetic K-index of 6 |
Issued: 2024-03-24 19.07 UTC |
Geomagnetic K-index of 6 Threshold Reached: 2024 Mar 24 1903 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-24 18.43 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 24 1840 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
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Geomagnetic K-index of 8, 9- |
Issued: 2024-03-24 16.29 UTC |
Geomagnetic K-index of 8, 9- Threshold Reached: 2024 Mar 24 1628 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G4 - Severe Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude. Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify. Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur. Navigation - Satellite navigation (GPS) degraded or inoperable for hours. Radio - HF (high frequency) radio propagation sporadic or blacked out. Aurora - Aurora may be seen as low as Alabama and northern California. |
ALERT |
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Geomagnetic K-index of 7 |
Issued: 2024-03-24 15.47 UTC |
Geomagnetic K-index of 7 Threshold Reached: 2024 Mar 24 1546 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G3 - Strong Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. |
WARNING |
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Geomagnetic K-index of 7 or greater expected |
Issued: 2024-03-24 15.43 UTC |
Geomagnetic K-index of 7 or greater expected Valid From: 2024 Mar 24 1543 UTC Valid To: 2024 Mar 25 0600 UTC Warning Condition: Onset NOAA Scale: G3 or greater Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. |
ALERT |
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Geomagnetic K-index of 6 |
Issued: 2024-03-24 15.31 UTC |
Geomagnetic K-index of 6 Threshold Reached: 2024 Mar 24 1526 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-24 15.17 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 24 1516 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
SUMMARY |
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Geomagnetic Sudden Impulse |
Issued: 2024-03-24 15.02 UTC |
Geomagnetic Sudden Impulse Observed: 2024 Mar 24 1437 UTC Deviation: 377 nT Station: MEA |
ALERT |
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Geomagnetic K-index of 6 |
Issued: 2024-03-24 14.45 UTC |
Geomagnetic K-index of 6 Threshold Reached: 2024 Mar 24 1444 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-24 14.43 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 24 1443 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-24 14.34 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4570 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 25 1500 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-24 14.34 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1860 Valid From: 2024 Mar 23 2036 UTC Now Valid Until: 2024 Mar 25 1200 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WARNING |
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Geomagnetic K-Index of 6 expected |
Issued: 2024-03-24 14.34 UTC |
Geomagnetic K-Index of 6 expected Valid From: 2024 Mar 24 1435 UTC Valid To: 2024 Mar 25 0900 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
WARNING |
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Geomagnetic Sudden Impulse expected |
Issued: 2024-03-24 14.26 UTC |
Geomagnetic Sudden Impulse expected Valid From: 2024 Mar 24 1430 UTC Valid To: 2024 Mar 24 1500 UTC IP Shock Passage Observed: 2024 Mar 24 1411 UTC |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-24 08.55 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1859 Valid From: 2024 Mar 23 2036 UTC Now Valid Until: 2024 Mar 24 1500 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-24 08.55 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4569 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 24 2100 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-24 03.01 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 24 0259 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
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Geomagnetic K-index of 6 |
Issued: 2024-03-23 23.22 UTC |
Geomagnetic K-index of 6 Threshold Reached: 2024 Mar 23 2320 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-23 22.24 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1858 Valid From: 2024 Mar 23 2036 UTC Now Valid Until: 2024 Mar 24 0900 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-23 22.23 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4568 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 24 1200 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
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Geomagnetic K-Index of 6 expected |
Issued: 2024-03-23 22.20 UTC |
Geomagnetic K-Index of 6 expected Valid From: 2024 Mar 23 2219 UTC Valid To: 2024 Mar 24 0600 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-23 21.44 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 23 2144 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-23 20.56 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 23 2055 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-03-23 20.43 UTC |
Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 551 Valid From: 2024 Mar 23 0617 UTC Now Valid Until: 2024 Mar 24 2359 UTC Warning Condition: Persistence Predicted NOAA Scale: S2 - Moderate Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. |
WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-23 20.37 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Mar 23 2036 UTC Valid To: 2024 Mar 24 0600 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WATCH |
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Geomagnetic Storm Category G3 Predicted |
Issued: 2024-03-23 18.40 UTC |
Geomagnetic Storm Category G3 Predicted Highest Storm Level Predicted by Day: Mar 24: G2 (Moderate) Mar 25: G3 (Strong) Mar 26: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-23 17.54 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4567 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 24 0600 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
SUMMARY |
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X-ray Event exceeded M5 |
Issued: 2024-03-23 15.14 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Mar 23 1351 UTC Maximum Time: 2024 Mar 23 1402 UTC End Time: 2024 Mar 23 1415 UTC X-ray Class: M5.3 Optical Class: sf Location: N21W02 NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth. Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes. |
ALERT |
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Proton Event 10MeV Integral Flux exceeded 100pfu |
Issued: 2024-03-23 14.30 UTC |
Proton Event 10MeV Integral Flux exceeded 100pfu Begin Time: 2024 Mar 23 1405 UTC NOAA Scale: S2 - Moderate Potential Impacts: Radiation - Passengers and crew in high latitude, high altitude flights may experience small, increased radiation exposures. Spacecraft - Infrequent single-event upsets to satellites are possible. Radio - Small effects on polar HF (high frequency) propagation resulting in fades at lower frequencies. |
ALERT |
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X-Ray Flux exceeded M5 |
Issued: 2024-03-23 13.54 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 23 1352 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-23 11.55 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4566 Valid From: 2024 Mar 23 0415 UTC Now Valid Until: 2024 Mar 23 1800 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-23 09.04 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 23 0859 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
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Proton Event 10MeV Integral Flux exceeded 10pfu |
Issued: 2024-03-23 08.33 UTC |
Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2024 Mar 23 0815 UTC NOAA Scale: S1 - Minor Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. |
WARNING |
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Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-03-23 06.17 UTC |
Proton 10MeV Integral Flux above 10pfu expected Valid From: 2024 Mar 23 0617 UTC Valid To: 2024 Mar 23 2100 UTC Warning Condition: Onset Predicted NOAA Scale: S1 - Minor Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-23 05.37 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 23 0536 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-23 05.23 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Mar 23 0523 UTC Valid To: 2024 Mar 23 1200 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
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Geomagnetic K-index of 4 |
Issued: 2024-03-23 05.12 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 23 0512 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-23 04.14 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Mar 23 0415 UTC Valid To: 2024 Mar 23 1200 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
SUMMARY |
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10cm Radio Burst |
Issued: 2024-03-23 02.33 UTC |
10cm Radio Burst Begin Time: 2024 Mar 23 0107 UTC Maximum Time: 2024 Mar 23 0117 UTC End Time: 2024 Mar 23 0213 UTC Duration: 66 minutes Peak Flux: 240 sfu Latest Penticton Noon Flux: 198 sfu Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications. |
SUMMARY |
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X-ray Event exceeded X1 |
Issued: 2024-03-23 02.31 UTC |
X-ray Event exceeded X1 Begin Time: 2024 Mar 23 0058 UTC Maximum Time: 2024 Mar 23 0133 UTC End Time: 2024 Mar 23 0222 UTC X-ray Class: X1.1 Location: N17E03 NOAA Scale: R3 - Strong Comment: Location is difficult to ascertain with certainty because both Region 3614 and Region 3615 (S13E10) erupted with nearly similar intensity. Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point. Radio - Wide area blackout of HF (high frequency) radio communication for about an hour. |
ALERT |
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Type II Radio Emission |
Issued: 2024-03-23 02.02 UTC |
Type II Radio Emission Begin Time: 2024 Mar 23 0109 UTC Estimated Velocity: 791 km/s Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event. |
ALERT |
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X-Ray Flux exceeded M5 |
Issued: 2024-03-23 01.19 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Mar 23 0116 UTC NOAA Scale: R2 - Moderate Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap. |
WATCH |
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Geomagnetic Storm Category G1 Predicted |
Issued: 2024-03-22 20.13 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 23: None (Below G1) Mar 24: None (Below G1) Mar 25: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-22 11.55 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4564 Valid From: 2024 Mar 21 0304 UTC Now Valid Until: 2024 Mar 22 1500 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-22 08.55 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4563 Valid From: 2024 Mar 21 0304 UTC Now Valid Until: 2024 Mar 22 1200 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-21 21.02 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 21 2059 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-21 20.39 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1855 Valid From: 2024 Mar 21 1342 UTC Now Valid Until: 2024 Mar 22 0600 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-21 20.28 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4562 Valid From: 2024 Mar 21 0304 UTC Now Valid Until: 2024 Mar 22 0900 UTC Warning Condition: Persistence Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-21 18.03 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 21 1753 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-03-21 14.42 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Mar 21 1441 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-03-21 13.42 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Mar 21 1342 UTC Valid To: 2024 Mar 21 2100 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine. |
ALERT |
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Geomagnetic K-index of 4 |
Issued: 2024-03-21 13.40 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Mar 21 1338 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-03-21 11.28 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4561 Valid From: 2024 Mar 21 0304 UTC Now Valid Until: 2024 Mar 21 2100 UTC Warning Condition: Onset Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska. |
Solar Wind
The solar wind is a stream of plasma released from the upper atmosphere of the Sun. It consists of mostly electrons, protons and alpha particles with energies usually between 1.5 and 10 keV. The stream of particles varies in density, temperature, and speed over time and over solar longitude. These particles can escape the Sun's gravity because of their high energy, from the high temperature of the corona and magnetic, electrical and electromagnetic phenomena in it.
The solar wind is divided into two components, respectively termed the slow solar wind and the fast solar wind. The slow solar wind has a velocity of about 400 km/s, a temperature of 1.4–1.6×10e6 K and a composition that is a close match to the corona. By contrast, the fast solar wind has a typical velocity of 750 km/s, a temperature of 8×10e5 K and it nearly matches the composition of the Sun's photosphere. The slow solar wind is twice as dense and more variable in intensity than the fast solar wind. The slow wind also has a more complex structure, with turbulent regions and large-scale structures.
Solar radio flux at 10.7 cm
The solar radio flux at 10.7 cm (2800 MHz) is an excellent indicator of solar activity. Often called the F10.7 index, it is one of the longest running records of solar activity. The F10.7 radio emissions originates high in the chromosphere and low in the corona of the solar atmosphere. The F10.7 correlates well with the sunspot number as well as a number of UltraViolet (UV) and visible solar irradiance records. Reported in “solar flux units”, (s.f.u.), the F10.7 can vary from below 50 s.f.u., to above 300 s.f.u., over the course of a solar cycle.
Flares
A solar flare is a sudden flash of brightness observed over the Sun's surface or the solar limb, which is interpreted as a large energy release of up to 6 × 10e25 joules of energy. They are often, but not always, followed by a colossal coronal mass ejection. The flare ejects clouds of electrons, ions, and atoms through the corona of the sun into space. These clouds typically reach Earth a day or two after the event.
Solar flares affect all layers of the solar atmosphere (photosphere, chromosphere, and corona), when the plasma medium is heated to tens of millions of kelvin, while the electrons, protons, and heavier ions are accelerated to near the speed of light. They produce radiation across the electromagnetic spectrum at all wavelengths, from radio waves to gamma rays, although most of the energy is spread over frequencies outside the visual range and for this reason the majority of the flares are not visible to the naked eye and must be observed with special instruments. Flares occur in active regions around sunspots, where intense magnetic fields penetrate the photosphere to link the corona to the solar interior. Flares are powered by the sudden (timescales of minutes to tens of minutes) release of magnetic energy stored in the corona. The same energy releases may produce coronal mass ejections (CME), although the relation between CMEs and flares is still not well established.
The frequency of occurrence of solar flares varies, from several per day when the Sun is particularly "active" to less than one every week when the Sun is "quiet", following the 11-year cycle (the solar cycle). Large flares are less frequent than smaller ones.
Classification
Solar flares are classified as A, B, C, M or X according to the peak flux (in watts per square metre, W/m2) of 100 to 800 picometre X-rays near Earth, as measured on the GOES spacecraft.
Classification |
Peak Flux Range at 100-800 picometer
W/m2 |
---|---|
A | < 10e-7 |
B | 10e-7 to 10e-6 |
C | 10e-6 to 10e-5 |
M | 10e-5 to 10e-4 |
X | 10e-4 to 10e-3 |
Z | > 10e-3 |
An earlier flare classification is based on Hα spectral observations. The scheme uses both the intensity and emitting surface. The classification in intensity is qualitative, referring to the flares as: (f)aint, (n)ormal or (b)rilliant. The emitting surface is measured in terms of millionths of the hemisphere and is described below. (The total hemisphere area AH = 6.2 × 1012 km2.)
Classification |
Corrected area
(millionths of hemisphere) |
---|---|
S | < 100 |
1 | 100 - 250 |
2 | 250 - 600 |
3 | 600 - 1200 |
4 | > 1200 |
Sunspots
Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They correspond to concentrations of magnetic field that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere. Sunspots usually appear in pairs, with pair members of opposite magnetic polarity. The number of sunspots varies according to the approximately 11-year solar cycle.
Sunspot populations quickly rise and more slowly fall on an irregular cycle of 11 years, although significant variations in the number of sunspots attending the 11-year period are known over longer spans of time. For example, from 1900 to the 1960s, the solar maxima trend of sunspot count has been upward; from the 1960s to the present, it has diminished somewhat. Over the last decades the Sun has had a markedly high average level of sunspot activity; it was last similarly active over 8,000 years ago.
The number of sunspots correlates with the intensity of solar radiation over the period since 1979, when satellite measurements of absolute radiative flux became available. Since sunspots are darker than the surrounding photosphere it might be expected that more sunspots would lead to less solar radiation and a decreased solar constant. However, the surrounding margins of sunspots are brighter than the average, and so are hotter; overall, more sunspots increase the Sun's solar constant or brightness. The variation caused by the sunspot cycle to solar output is relatively small, on the order of 0.1% of the solar constant (a peak-to-trough range of 1.3 W/m2 compared to 1366 W/m2 for the average solar constant).
K-indices
Today
0h UTC |
3h UTC |
6h UTC |
9h UTC |
12h UTC |
15h UTC |
18h UTC |
21h UTC |
2. | 67 | - | 1. | 00 | - | 1. |
Data
Estimated Planetary
Date | A | K-indices (UTC) | |||||||
---|---|---|---|---|---|---|---|---|---|
0h | 3h | 6h | 9h | 12h | 15h | 18h | 21h | ||
2024-03-22 | 11 | 3. | 67 | 3. | 33 | 3. | |||
2024-03-23 | 36 | 2. | 67 | 5. | 00 | 4. | |||
2024-03-24 | 64 | 4. | 67 | 3. | 33 | 3. | |||
2024-03-25 | 22 | 4. | 33 | 5. | 00 | 3. | |||
2024-03-26 | 11 | 3. | 33 | 2. | 67 | 1. | |||
2024-03-27 | 7 | 3. | 00 | 1. | 33 | 2. | |||
2024-03-28 | 7 | 2. | 00 | 1. | 33 | 2. | |||
2024-03-29 | 6 | 2. | 00 | 2. | 00 | 1. | |||
2024-03-30 | 5 | 0. | 67 | 1. | 00 | 1. | |||
2024-03-31 | 9 | 3. | 67 | 2. | 00 | 2. | |||
2024-04-01 | 11 | 2. | 00 | 3. | 33 | 3. | |||
2024-04-02 | 8 | 1. | 67 | 1. | 67 | 1. | |||
2024-04-03 | 7 | 3. | 00 | 2. | 33 | 1. | |||
2024-04-04 | 12 | 1. | 67 | 1. | 33 | 2. | |||
2024-04-05 | 12 | 2. | 33 | 3. | 33 | 3. | |||
2024-04-06 | 10 | 3. | 33 | 2. | 33 | 3. | |||
2024-04-07 | 6 | 1. | 67 | 2. | 00 | 1. | |||
2024-04-08 | 8 | 2. | 67 | 3. | 33 | 3. | |||
2024-04-09 | 11 | 0. | 67 | 2. | 67 | 3. | |||
2024-04-10 | 8 | 3. | 00 | 1. | 67 | 2. | |||
2024-04-11 | 6 | 2. | 33 | 2. | 67 | 0. | |||
2024-04-12 | 7 | 2. | 33 | 2. | 67 | 1. | |||
2024-04-13 | 5 | 2. | 00 | 2. | 33 | 0. | |||
2024-04-14 | 6 | 2. | 33 | 1. | 00 | 2. | |||
2024-04-15 | 8 | 2. | 33 | 2. | 00 | 0. | |||
2024-04-16 | 31 | 4. | 00 | 3. | 33 | 4. | |||
2024-04-17 | 7 | 3. | 00 | 1. | 33 | 1. | |||
2024-04-18 | 4 | 1. | 67 | 0. | 67 | 0. | |||
2024-04-19 | 41 | 2. | 33 | 1. | 33 | 4. | |||
2024-04-20 | 42 | 2. | 67 | - | 1. | 00 | - | 1. |
Date | A | K-indices | |||||||
---|---|---|---|---|---|---|---|---|---|
2024-03-22 | 10 | 3 | 3 | 3 | 3 | 1 | 2 | 1 | 1 |
2024-03-23 | 25 | 3 | 5 | 4 | 4 | 3 | 4 | 3 | 4 |
2024-03-24 | 43 | 4 | 3 | 3 | 4 | 5 | 7 | 5 | 4 |
2024-03-25 | 17 | 4 | 4 | 3 | 3 | 4 | 2 | 2 | 2 |
2024-03-26 | 11 | 3 | 2 | 1 | 3 | 2 | 2 | 3 | 3 |
2024-03-27 | 7 | 3 | 1 | 2 | 2 | 2 | 2 | 1 | 2 |
2024-03-28 | 6 | 1 | 1 | 2 | 1 | 2 | 2 | 2 | 2 |
2024-03-29 | 4 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 0 |
2024-03-30 | 4 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 |
2024-03-31 | 8 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
2024-04-01 | 9 | 1 | 3 | 3 | 1 | 2 | 3 | 2 | 2 |
2024-04-02 | 7 | 0 | 1 | 1 | 3 | 3 | 3 | 1 | 1 |
2024-04-03 | 10 | 2 | 1 | 1 | 1 | 2 | 2 | 1 | 5 |
2024-04-04 | 33 | 6 | 3 | 3 | 3 | 3 | 4 | 6 | 3 |
2024-04-05 | 10 | 2 | 3 | 2 | 3 | 2 | 3 | 2 | 2 |
2024-04-06 | 8 | 3 | 2 | 3 | 2 | 2 | 1 | 1 | 2 |
2024-04-07 | 5 | 1 | 2 | 1 | 1 | 2 | 2 | 1 | 1 |
2024-04-08 | 8 | 2 | 3 | 3 | 1 | 2 | 2 | 1 | 1 |
2024-04-09 | 10 | 1 | 2 | 3 | 2 | 3 | 2 | 2 | 3 |
2024-04-10 | 7 | 2 | 1 | 2 | 2 | 3 | 2 | 2 | 1 |
2024-04-11 | 6 | 2 | 2 | 0 | 2 | 2 | 2 | 2 | 1 |
2024-04-12 | 6 | 1 | 2 | 1 | 2 | 2 | 2 | 2 | 2 |
2024-04-13 | 6 | 2 | 2 | 0 | 1 | 2 | 3 | 2 | 1 |
2024-04-14 | 5 | 1 | 0 | 2 | 2 | 2 | 1 | 2 | 2 |
2024-04-15 | 7 | 1 | 2 | 0 | 2 | 2 | 2 | 2 | 3 |
2024-04-16 | 17 | 3 | 1 | 4 | 3 | 3 | 3 | 4 | |
2024-04-17 | 8 | 3 | 2 | 1 | 2 | 2 | 1 | 3 | 2 |
2024-04-18 | 5 | 2 | 0 | 2 | 1 | 2 | 1 | 2 | |
2024-04-19 | 21 | 2 | 1 | 4 | 4 | 4 | 3 | 5 | 3 |
2024-04-20 | 2 |
Date | A | K-indices | |||||||
---|---|---|---|---|---|---|---|---|---|
2024-03-22 | 9 | 3 | 2 | 3 | 4 | 1 | 1 | 0 | 0 |
2024-03-23 | 44 | 2 | 4 | 7 | 5 | 4 | 5 | 4 | 4 |
2024-03-24 | 00 | 4 | 4 | 5 | 5 | 6 | 9 | 7 | 4 |
2024-03-25 | 21 | 3 | 3 | 4 | 4 | 5 | 3 | 3 | 1 |
2024-03-26 | 9 | 2 | 3 | 1 | 3 | 3 | 2 | 1 | 2 |
2024-03-27 | 4 | 2 | 2 | 2 | 2 | 1 | 0 | 0 | 1 |
2024-03-28 | 13 | 2 | 2 | 1 | 5 | 4 | 1 | 1 | 1 |
2024-03-29 | 6 | 1 | 0 | 3 | 3 | 3 | 1 | 0 | 0 |
2024-03-30 | 2 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 |
2024-03-31 | 4 | 2 | 1 | 2 | 2 | 0 | 1 | 0 | 2 |
2024-04-01 | 14 | 2 | 3 | 5 | 3 | 3 | 1 | 2 | 1 |
2024-04-02 | 9 | 1 | 1 | 0 | 5 | 2 | 1 | 1 | 1 |
2024-04-03 | 8 | 2 | 2 | 2 | 3 | 2 | 3 | 1 | 0 |
2024-04-04 | 18 | 0 | 0 | 2 | 5 | 5 | 3 | 2 | 3 |
2024-04-05 | 21 | 2 | 3 | 4 | 5 | 5 | 3 | 2 | 1 |
2024-04-06 | 12 | 3 | 2 | 4 | 3 | 3 | 1 | 2 | 1 |
2024-04-07 | 8 | 2 | 2 | 1 | 3 | 3 | 2 | 1 | 1 |
2024-04-08 | 9 | 2 | 3 | 4 | 3 | 1 | 1 | 0 | 0 |
2024-04-09 | 18 | 1 | 2 | 3 | 5 | 5 | 2 | 2 | 2 |
2024-04-10 | 11 | 2 | 1 | 1 | 4 | 2 | 4 | 2 | 1 |
2024-04-11 | 3 | 2 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
2024-04-12 | 3 | 1 | 2 | 1 | 1 | 0 | 1 | 1 | 1 |
2024-04-13 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 |
2024-04-14 | 3 | 2 | 0 | 2 | 1 | 1 | 0 | 1 | 1 |
2024-04-15 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 2 | 1 |
2024-04-16 | 36 | 3 | 3 | 5 | 4 | 4 | 5 | 6 | 4 |
2024-04-17 | 13 | 3 | 1 | 1 | 3 | 3 | 5 | 1 | 1 |
2024-04-18 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
2024-04-19 | 46 | 2 | 1 | 5 | 5 | 4 | 7 | 6 | 3 |
2024-04-20 | 2 |
The K-index quantifies disturbances in the horizontal component of earth's magnetic field with an integer in the range 0–9 with 1 being calm and 5 or more indicating a geomagnetic storm. It is derived from the maximum fluctuations of horizontal components observed on a magnetometer during a three-hour interval. The label K comes from the German word Kennziffer meaning “characteristic digit”. The K-index was introduced by Julius Bartels in 1938.
The Estimated 3-hour Planetary Kp-index is derived at the NOAA Space Weather Prediction Center using data from the following ground-based magnetometers:
- Sitka, Alaska
- Meanook, Canada
- Ottawa, Canada
- Fredericksburg, Virginia
- Hartland, UK
- Wingst, Germany
- Niemegk, Germany
- Canberra, Australia
These data are made available thanks to the cooperative efforts between SWPC and data providers around the world, which currently includes the U.S. Geological Survey, Natural Resources Canada (NRCAN), the British Geological Survey, the German Research Centre for Geosciences (GFZ), and Geoscience Australia. Important magnetometer observations are also contributed by the Institut de Physique du Globe de Paris and the Korean Space Weather Center K-index Watches are issued when the highest predicted NOAA estimated Kp-indices for a day are K = 5, 6, 7, or >= 8 and is reported in terms of the NOAA G scale. K-index Warnings are issued when NOAA estimated Kp-indices of 4, 5, 6, and 7 or greater are expected. K-index Alerts are issued when the NOAA estimated Kp-indices reach 4, 5, 6, 7, 8, or 9.
More info
Data source: |