Date | Radio flux 10.7 cm | SESC Sunspot number | Sunspot area 10E-6 | New regions | GOES15 X-ray Bkgd flux | Flares | ||||||
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X-ray | Optical | |||||||||||
C | M | X | S | 1 | 2 | 3 | ||||||
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2024-06-27 | 183 | 146 | 820 | 1 | * | 12 | 0 | 0 | 5 | 0 | 0 | 0 |
2024-06-28 | 181 | 162 | 1320 | 2 | * | 8 | 0 | 0 | 10 | 0 | 0 | 0 |
2024-06-29 | 186 | 205 | 1250 | 3 | * | 7 | 0 | 0 | 2 | 0 | 0 | 0 |
2024-06-30 | 174 | 199 | 1150 | 0 | * | 7 | 0 | 0 | 6 | 0 | 0 | 0 |
2024-07-01 | 171 | 192 | 880 | 0 | * | 8 | 1 | 0 | 12 | 1 | 0 | 0 |
2024-07-02 | 164 | 192 | 690 | 0 | * | 11 | 0 | 0 | 1 | 0 | 0 | 0 |
2024-07-03 | 167 | 182 | 670 | 1 | * | 6 | 1 | 0 | 7 | 2 | 0 | 0 |
2024-07-04 | 173 | 113 | 730 | 1 | * | 6 | 2 | 0 | 5 | 0 | 0 | 0 |
2024-07-05 | 166 | 111 | 990 | 1 | * | 9 | 0 | 0 | 4 | 0 | 0 | 0 |
2024-07-06 | 166 | 132 | 870 | 2 | * | 6 | 1 | 0 | 14 | 0 | 0 | 0 |
2024-07-07 | 171 | 119 | 650 | 1 | * | 8 | 5 | 0 | 18 | 0 | 0 | 0 |
2024-07-08 | 169 | 95 | 470 | 1 | * | 16 | 1 | 0 | 15 | 0 | 0 | 0 |
2024-07-09 | 180 | 143 | 570 | 2 | * | 7 | 0 | 0 | 13 | 0 | 0 | 0 |
2024-07-10 | 214 | 190 | 1270 | 1 | * | 7 | 5 | 0 | 19 | 3 | 0 | 0 |
2024-07-11 | 205 | 188 | 1440 | 2 | * | 5 | 2 | 0 | 11 | 3 | 0 | 0 |
2024-07-12 | 210 | 162 | 1740 | 1 | * | 5 | 0 | 0 | 10 | 0 | 0 | 0 |
2024-07-13 | 238 | 214 | 1960 | 3 | * | 5 | 6 | 0 | 17 | 2 | 1 | 0 |
2024-07-14 | 234 | 217 | 2050 | 1 | * | 12 | 4 | 1 | 34 | 3 | 0 | 0 |
2024-07-15 | 233 | 205 | 1890 | 2 | * | 5 | 3 | 0 | 20 | 1 | 0 | 0 |
2024-07-16 | 242 | 250 | 1540 | 3 | * | 3 | 4 | 1 | 7 | 6 | 0 | 0 |
2024-07-17 | 224 | 275 | 1190 | 2 | * | 4 | 5 | 0 | 11 | 1 | 1 | 0 |
2024-07-18 | 209 | 276 | 1230 | 1 | * | 12 | 2 | 0 | 20 | 1 | 0 | 0 |
2024-07-19 | 202 | 269 | 1040 | 1 | * | 6 | 3 | 0 | 16 | 2 | 1 | 0 |
2024-07-20 | 207 | 212 | 1160 | 1 | * | 8 | 2 | 0 | 20 | 2 | 0 | 0 |
2024-07-21 | 198 | 200 | 1360 | 0 | * | 15 | 4 | 0 | 15 | 1 | 0 | 0 |
2024-07-22 | 185 | 173 | 1080 | 2 | * | 15 | 5 | 0 | 18 | 1 | 0 | 0 |
2024-07-23 | 176 | 167 | 1175 | 1 | * | 4 | 1 | 0 | 12 | 1 | 0 | 0 |
2024-07-24 | 175 | 160 | 880 | 1 | * | 7 | 2 | 0 | 8 | 1 | 1 | 0 |
2024-07-25 | 167 | 171 | 730 | 1 | * | 9 | 1 | 0 | 11 | 2 | 0 | 0 |
2024-07-26 | 176 | 181 | 1060 | 2 | * | 7 | 1 | 0 | 16 | 0 | 0 | 0 |
Average/Total | 192 | 183 | 1129 | 40 | 240 | 61 | 2 | 377 | 33 | 4 | 0 |
Space weather
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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 4 |
Issued: 2024-07-27 11.05 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Jul 27 1104 UTC Synoptic Period: 0900-1200 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. |
WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-07-27 10.59 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 27: G1 (Minor) Jul 28: None (Below G1) Jul 29: 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: 2024-07-27 10.45 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Jul 27 1045 UTC Valid To: 2024 Jul 27 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. |
ALERT |
---|
Type IV Radio Emission |
Issued: 2024-07-27 09.49 UTC |
Type IV Radio Emission Begin Time: 2024 Jul 27 0643 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. |
SUMMARY |
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10cm Radio Burst |
Issued: 2024-07-27 06.04 UTC |
10cm Radio Burst Begin Time: 2024 Jul 27 0537 UTC Maximum Time: 2024 Jul 27 0539 UTC End Time: 2024 Jul 27 0543 UTC Duration: 6 minutes Peak Flux: 320 sfu Latest Penticton Noon Flux: 176 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. |
ALERT |
---|
Type II Radio Emission |
Issued: 2024-07-27 06.00 UTC |
Type II Radio Emission Begin Time: 2024 Jul 27 0434 UTC Estimated Velocity: 251 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 |
---|
Type II Radio Emission |
Issued: 2024-07-27 05.00 UTC |
Type II Radio Emission Begin Time: 2024 Jul 27 0433 UTC Estimated Velocity: 1046 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. |
WARNING |
---|
Geomagnetic K-index of 5 expected |
Issued: 2024-07-26 15.59 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Jul 26 1559 UTC Valid To: 2024 Jul 26 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: 2024-07-26 14.55 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Jul 26 1450 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. |
WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-07-26 14.34 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Jul 26 1434 UTC Valid To: 2024 Jul 26 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. |
ALERT |
---|
Geomagnetic K-index of 5 |
Issued: 2024-07-26 05.44 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Jul 26 0541 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. |
ALERT |
---|
Geomagnetic K-index of 4 |
Issued: 2024-07-26 04.09 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Jul 26 0400 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 |
---|
Geomagnetic K-index of 5 expected |
Issued: 2024-07-26 04.02 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Jul 26 0402 UTC Valid To: 2024 Jul 26 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. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-07-26 02.30 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4646 Valid From: 2024 Jul 25 2015 UTC Now Valid Until: 2024 Jul 26 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 |
---|
Geomagnetic K-index of 4 |
Issued: 2024-07-26 01.21 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Jul 26 0120 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: 2024-07-25 20.15 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Jul 25 2015 UTC Valid To: 2024 Jul 26 0300 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 |
---|
Type II Radio Emission |
Issued: 2024-07-25 16.29 UTC |
Type II Radio Emission Begin Time: 2024 Jul 25 1535 UTC Estimated Velocity: 749 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. |
SUMMARY |
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Geomagnetic Sudden Impulse |
Issued: 2024-07-25 14.54 UTC |
Geomagnetic Sudden Impulse Observed: 2024 Jul 25 1422 UTC Deviation: 8 nT Station: BOU |
WARNING |
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Geomagnetic Sudden Impulse expected |
Issued: 2024-07-25 13.51 UTC |
Geomagnetic Sudden Impulse expected Valid From: 2024 Jul 25 1348 UTC Valid To: 2024 Jul 25 1425 UTC IP Shock Passage Observed: 2024 Jul 25 1315 UTC |
ALERT |
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Type II Radio Emission |
Issued: 2024-07-25 12.49 UTC |
Type II Radio Emission Begin Time: 2024 Jul 25 1234 UTC Estimated Velocity: 775 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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Type II Radio Emission |
Issued: 2024-07-24 19.16 UTC |
Type II Radio Emission Begin Time: 2024 Jul 24 1816 UTC Estimated Velocity: 687 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. |
WATCH |
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Geomagnetic Storm Category G1 Predicted |
Issued: 2024-07-24 18.19 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 25: None (Below G1) Jul 26: None (Below G1) Jul 27: 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 |
---|
Type II Radio Emission |
Issued: 2024-07-24 17.46 UTC |
Type II Radio Emission Begin Time: 2024 Jul 24 1726 UTC Estimated Velocity: 457 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. |
CANCEL WARNING |
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Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-07-24 11.13 UTC |
Proton 10MeV Integral Flux above 10pfu expected Cancel Serial Number: 571 Original Issue Time: 2024 Jul 23 0156 UTC Comment: Conditions for this warning are no longer present Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. |
SUMMARY |
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Proton Event 100MeV Integral Flux exceeded 1pfu |
Issued: 2024-07-24 08.50 UTC |
Proton Event 100MeV Integral Flux exceeded 1pfu Begin Time: 2024 Jul 23 0205 UTC Maximum Time: 2024 Jul 23 0430 UTC End Time: 2024 Jul 23 1510 UTC Maximum 100MeV Flux: 1 pfu |
SUMMARY |
---|
Proton Event 10MeV Integral Flux exceeded 10pfu |
Issued: 2024-07-24 08.50 UTC |
Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2024 Jul 23 0300 UTC Maximum Time: 2024 Jul 23 1040 UTC End Time: 2024 Jul 23 2350 UTC Maximum 10MeV Flux: 24 pfu NOAA Scale: S1 - Minor |
ALERT |
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Type IV Radio Emission |
Issued: 2024-07-24 08.08 UTC |
Type IV Radio Emission Begin Time: 2024 Jul 24 0744 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 |
---|
Type II Radio Emission |
Issued: 2024-07-24 07.57 UTC |
Type II Radio Emission Begin Time: 2024 Jul 24 0744 UTC Estimated Velocity: 407 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. |
CANCEL WARNING |
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Proton 100MeV Integral Flux above 1pfu expected |
Issued: 2024-07-24 02.03 UTC |
Proton 100MeV Integral Flux above 1pfu expected Cancel Serial Number: 108 Original Issue Time: 2024 Jul 23 0140 UTC Comment: Conditions have dropped below threshold. Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact. |
EXTENDED WARNING |
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Proton 100MeV Integral Flux above 1pfu expected |
Issued: 2024-07-23 19.30 UTC |
Proton 100MeV Integral Flux above 1pfu expected Extension to Serial Number: 107 Valid From: 2024 Jul 23 0140 UTC Now Valid Until: 2024 Jul 24 1200 UTC Warning Condition: persistence Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact. |
EXTENDED WARNING |
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Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-07-23 19.29 UTC |
Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 570 Valid From: 2024 Jul 23 0155 UTC Now Valid Until: 2024 Jul 24 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. |
ALERT |
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Type II Radio Emission |
Issued: 2024-07-23 14.33 UTC |
Type II Radio Emission Begin Time: 2024 Jul 23 1411 UTC Estimated Velocity: 457 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. |
EXTENDED WARNING |
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Proton 100MeV Integral Flux above 1pfu expected |
Issued: 2024-07-23 10.24 UTC |
Proton 100MeV Integral Flux above 1pfu expected Extension to Serial Number: 106 Valid From: 2024 Jul 23 0140 UTC Now Valid Until: 2024 Jul 23 2359 UTC Warning Condition: persistence Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact. |
EXTENDED WARNING |
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Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-07-23 10.24 UTC |
Proton 10MeV Integral Flux above 10pfu expected Extension to Serial Number: 569 Valid From: 2024 Jul 23 0155 UTC Now Valid Until: 2024 Jul 23 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. |
ALERT |
---|
Proton Event 10MeV Integral Flux exceeded 10pfu |
Issued: 2024-07-23 03.07 UTC |
Proton Event 10MeV Integral Flux exceeded 10pfu Begin Time: 2024 Jul 23 0306 UTC NOAA Scale: S1 - Minor Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies. |
ALERT |
---|
Proton Event 100MeV Integral Flux exceeded 1pfu |
Issued: 2024-07-23 02.12 UTC |
Proton Event 100MeV Integral Flux exceeded 1pfu Begin Time: 2024 Jul 23 0211 UTC Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact. |
WARNING |
---|
Proton 10MeV Integral Flux above 10pfu expected |
Issued: 2024-07-23 01.56 UTC |
Proton 10MeV Integral Flux above 10pfu expected Valid From: 2024 Jul 23 0155 UTC Valid To: 2024 Jul 23 1200 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. |
WARNING |
---|
Proton 100MeV Integral Flux above 1pfu expected |
Issued: 2024-07-23 01.40 UTC |
Proton 100MeV Integral Flux above 1pfu expected Valid From: 2024 Jul 23 0140 UTC Valid To: 2024 Jul 23 1200 UTC Warning Condition: Onset Potential Impacts: An enhancement in the energetic portion of the solar radiation spectrum may indicate increased biological risk to astronauts or passengers and crew in high latitude, high altitude flights. Additionally, energetic particles may represent an increased risk to all satellite systems susceptible to single event effects. This information should be used in conjunction with the current Solar Radiation Storm conditions when assessing overall impact. |
WARNING |
---|
Geomagnetic K-index of 4 expected |
Issued: 2024-07-22 11.40 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Jul 22 1139 UTC Valid To: 2024 Jul 22 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 |
---|
Type II Radio Emission |
Issued: 2024-07-22 09.44 UTC |
Type II Radio Emission Begin Time: 2024 Jul 22 0926 UTC Estimated Velocity: 536 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. |
WATCH |
---|
Geomagnetic Storm Category G2 Predicted |
Issued: 2024-07-22 06.26 UTC |
Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Jul 22: None (Below G1) Jul 23: None (Below G1) Jul 24: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT 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. |
CANCEL WATCH |
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Geomagnetic Storm Category G1 Predicted |
Issued: 2024-07-21 18.05 UTC |
Geomagnetic Storm Category G1 Predicted Cancel Serial Number: 1004 Original Issue Time: 2024 Jul 18 1845 UTC Comment: G1 (Minor) conditions are no longer anticipated. 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 |
---|
10cm Radio Burst |
Issued: 2024-07-19 18.16 UTC |
10cm Radio Burst Begin Time: 2024 Jul 19 1801 UTC Maximum Time: 2024 Jul 19 1802 UTC End Time: 2024 Jul 19 1803 UTC Duration: 2 minutes Peak Flux: 470 sfu Latest Penticton Noon Flux: 209 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. |
WATCH |
---|
Geomagnetic Storm Category G1 Predicted |
Issued: 2024-07-18 18.45 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 19: None (Below G1) Jul 20: None (Below G1) Jul 21: 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 |
---|
Type IV Radio Emission |
Issued: 2024-07-17 07.58 UTC |
Type IV Radio Emission Begin Time: 2024 Jul 17 0722 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 |
---|
Type II Radio Emission |
Issued: 2024-07-17 07.20 UTC |
Type II Radio Emission Begin Time: 2024 Jul 17 0700 UTC Estimated Velocity: 334 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. |
SUMMARY |
---|
X-ray Event exceeded M5 |
Issued: 2024-07-17 07.14 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Jul 17 0626 UTC Maximum Time: 2024 Jul 17 0639 UTC End Time: 2024 Jul 17 0701 UTC X-ray Class: M5.0 Optical Class: 2b Location: S08W30 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 II Radio Emission |
Issued: 2024-07-17 07.02 UTC |
Type II Radio Emission Begin Time: 2024 Jul 17 0641 UTC Estimated Velocity: 389 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. |
SUMMARY |
---|
10cm Radio Burst |
Issued: 2024-07-17 06.55 UTC |
10cm Radio Burst Begin Time: 2024 Jul 17 0634 UTC Maximum Time: 2024 Jul 17 0635 UTC End Time: 2024 Jul 17 0637 UTC Duration: 3 minutes Peak Flux: 560 sfu Latest Penticton Noon Flux: 242 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. |
ALERT |
---|
X-Ray Flux exceeded M5 |
Issued: 2024-07-17 06.41 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Jul 17 0638 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. |
ALERT |
---|
Type IV Radio Emission |
Issued: 2024-07-16 23.05 UTC |
Type IV Radio Emission Begin Time: 2024 Jul 16 2220 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 |
---|
Type II Radio Emission |
Issued: 2024-07-16 22.30 UTC |
Type II Radio Emission Begin Time: 2024 Jul 16 2208 UTC Estimated Velocity: 633 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 |
---|
Type IV Radio Emission |
Issued: 2024-07-16 14.09 UTC |
Type IV Radio Emission Begin Time: 2024 Jul 16 1338 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 |
---|
Type II Radio Emission |
Issued: 2024-07-16 13.59 UTC |
Type II Radio Emission Begin Time: 2024 Jul 16 1321 UTC Estimated Velocity: 516 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. |
SUMMARY |
---|
X-ray Event exceeded X1 |
Issued: 2024-07-16 13.46 UTC |
X-ray Event exceeded X1 Begin Time: 2024 Jul 16 1311 UTC Maximum Time: 2024 Jul 16 1326 UTC End Time: 2024 Jul 16 1336 UTC X-ray Class: X1.9 Location: S05W85 NOAA Scale: R3 - Strong 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. |
SUMMARY |
---|
10cm Radio Burst |
Issued: 2024-07-16 13.40 UTC |
10cm Radio Burst Begin Time: 2024 Jul 16 1318 UTC Maximum Time: 2024 Jul 16 1320 UTC End Time: 2024 Jul 16 1326 UTC Duration: 8 minutes Peak Flux: 550 sfu Latest Penticton Noon Flux: 233 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. |
ALERT |
---|
X-Ray Flux exceeded M5 |
Issued: 2024-07-16 13.23 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Jul 16 1320 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 X1 |
Issued: 2024-07-14 03.03 UTC |
X-ray Event exceeded X1 Begin Time: 2024 Jul 14 0233 UTC Maximum Time: 2024 Jul 14 0234 UTC End Time: 2024 Jul 14 0248 UTC X-ray Class: X1.2 Location: S09W40 NOAA Scale: R3 - Strong 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. |
SUMMARY |
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10cm Radio Burst |
Issued: 2024-07-14 02.51 UTC |
10cm Radio Burst Begin Time: 2024 Jul 14 0231 UTC Maximum Time: 2024 Jul 14 0232 UTC End Time: 2024 Jul 14 0235 UTC Duration: 4 minutes Peak Flux: 380 sfu Latest Penticton Noon Flux: 238 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. |
ALERT |
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X-Ray Flux exceeded M5 |
Issued: 2024-07-14 02.34 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Jul 14 0233 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: 2024-07-13 23.30 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Jul 13 2244 UTC Maximum Time: 2024 Jul 13 2301 UTC End Time: 2024 Jul 13 2312 UTC X-ray Class: M5.0 Location: S09W40 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: 2024-07-13 23.04 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Jul 13 2302 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: 2024-07-13 13.25 UTC |
X-ray Event exceeded M5 Begin Time: 2024 Jul 13 1221 UTC Maximum Time: 2024 Jul 13 1242 UTC End Time: 2024 Jul 13 1258 UTC X-ray Class: M5.3 Location: S07W41 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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Type II Radio Emission |
Issued: 2024-07-13 12.57 UTC |
Type II Radio Emission Begin Time: 2024 Jul 13 1242 UTC Estimated Velocity: 295 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: 2024-07-13 12.41 UTC |
X-Ray Flux exceeded M5 Threshold Reached: 2024 Jul 13 1237 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: 2024-07-11 00.05 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 12: None (Below G1) Jul 13: G1 (Minor) Jul 14: 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 |
---|
Type II Radio Emission |
Issued: 2024-07-04 20.30 UTC |
Type II Radio Emission Begin Time: 2024 Jul 04 2007 UTC Estimated Velocity: 387 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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Type II Radio Emission |
Issued: 2024-07-04 15.28 UTC |
Type II Radio Emission Begin Time: 2024 Jul 04 1427 UTC Estimated Velocity: 815 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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Electron 2MeV Integral Flux exceeded 1000pfu |
Issued: 2024-07-03 18.59 UTC |
Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2024 Jul 03 1840 UTC Station: GOES16 Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. |
ALERT |
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Type II Radio Emission |
Issued: 2024-07-03 09.03 UTC |
Type II Radio Emission Begin Time: 2024 Jul 03 0742 UTC Estimated Velocity: 1254 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. |
WATCH |
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Geomagnetic Storm Category G1 Predicted |
Issued: 2024-07-01 18.26 UTC |
Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Jul 02: None (Below G1) Jul 03: G1 (Minor) Jul 04: 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. |
WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-06-30 17.14 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Jun 30 1710 UTC Valid To: 2024 Jun 30 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. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-06-29 08.59 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4642 Valid From: 2024 Jun 27 2153 UTC Now Valid Until: 2024 Jun 29 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. |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-06-28 20.54 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4641 Valid From: 2024 Jun 27 2153 UTC Now Valid Until: 2024 Jun 29 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. |
EXTENDED WARNING |
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Geomagnetic K-index of 5 expected |
Issued: 2024-06-28 20.54 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1893 Valid From: 2024 Jun 28 0150 UTC Now Valid Until: 2024 Jun 29 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. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-06-28 19.15 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Jun 28 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. |
ALERT |
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Geomagnetic K-index of 5 |
Issued: 2024-06-28 15.22 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Jun 28 1520 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. |
ALERT |
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Geomagnetic K-index of 8, 9- |
Issued: 2024-06-28 14.18 UTC |
Geomagnetic K-index of 8, 9- Threshold Reached: 2024 Jun 28 1415 UTC Synoptic Period: 1200-1500 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. |
EXTENDED WARNING |
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Geomagnetic K-Index of 6 expected |
Issued: 2024-06-28 13.35 UTC |
Geomagnetic K-Index of 6 expected Extension to Serial Number: 530 Valid From: 2024 Jun 28 1135 UTC Now Valid Until: 2024 Jun 28 2100 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. |
ALERT |
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Geomagnetic K-index of 7 |
Issued: 2024-06-28 13.28 UTC |
Geomagnetic K-index of 7 Threshold Reached: 2024 Jun 28 1327 UTC Synoptic Period: 1200-1500 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: 2024-06-28 13.24 UTC |
Geomagnetic K-index of 7 or greater expected Valid From: 2024 Jun 28 1325 UTC Valid To: 2024 Jun 28 2100 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: 2024-06-28 13.11 UTC |
Geomagnetic K-index of 6 Threshold Reached: 2024 Jun 28 1310 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: 2024-06-28 12.21 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Jun 28 1220 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. |
ALERT |
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Geomagnetic K-index of 6 |
Issued: 2024-06-28 11.47 UTC |
Geomagnetic K-index of 6 Threshold Reached: 2024 Jun 28 1147 UTC Synoptic Period: 0900-1200 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 |
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Geomagnetic K-Index of 6 expected |
Issued: 2024-06-28 11.36 UTC |
Geomagnetic K-Index of 6 expected Valid From: 2024 Jun 28 1135 UTC Valid To: 2024 Jun 28 1800 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: 2024-06-28 11.36 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1892 Valid From: 2024 Jun 28 0150 UTC Now Valid Until: 2024 Jun 28 2100 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: 2024-06-28 11.36 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4640 Valid From: 2024 Jun 27 2153 UTC Now Valid Until: 2024 Jun 28 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 |
---|
Geomagnetic K-index of 5 |
Issued: 2024-06-28 11.25 UTC |
Geomagnetic K-index of 5 Threshold Reached: 2024 Jun 28 1125 UTC Synoptic Period: 0900-1200 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 Sudden Impulse expected |
Issued: 2024-06-28 09.26 UTC |
Geomagnetic Sudden Impulse expected Valid From: 2024 Jun 28 1005 UTC Valid To: 2024 Jun 28 1035 UTC IP Shock Passage Observed: 2024 Jun 28 0912 UTC |
EXTENDED WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-06-28 05.55 UTC |
Geomagnetic K-index of 4 expected Extension to Serial Number: 4639 Valid From: 2024 Jun 27 2153 UTC Now Valid Until: 2024 Jun 28 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: 2024-06-28 05.55 UTC |
Geomagnetic K-index of 5 expected Extension to Serial Number: 1891 Valid From: 2024 Jun 28 0150 UTC Now Valid Until: 2024 Jun 28 1500 UTC Warning Condition: Onset 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: 2024-06-28 02.21 UTC |
Geomagnetic K-index of 4 Threshold Reached: 2024 Jun 28 0202 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 5 expected |
Issued: 2024-06-28 01.51 UTC |
Geomagnetic K-index of 5 expected Valid From: 2024 Jun 28 0150 UTC Valid To: 2024 Jun 28 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. |
WARNING |
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Geomagnetic K-index of 4 expected |
Issued: 2024-06-27 21.54 UTC |
Geomagnetic K-index of 4 expected Valid From: 2024 Jun 27 2153 UTC Valid To: 2024 Jun 28 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. |
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 |
1. | 67 | 2. | 67 | 2. |
Data
Estimated Planetary
Date | A | K-indices (UTC) | |||||||
---|---|---|---|---|---|---|---|---|---|
0h | 3h | 6h | 9h | 12h | 15h | 18h | 21h | ||
2024-06-28 | 59 | 4. | 33 | 4. | 33 | 3. | |||
2024-06-29 | 14 | 4. | 33 | 2. | 67 | 2. | |||
2024-06-30 | 11 | 2. | 67 | 2. | 67 | 1. | |||
2024-07-01 | 6 | 1. | 67 | 1. | 67 | 2. | |||
2024-07-02 | 5 | 1. | 33 | 1. | 67 | 1. | |||
2024-07-03 | 5 | 2. | 00 | 1. | 33 | 2. | |||
2024-07-04 | 10 | 2. | 00 | 2. | 33 | 1. | |||
2024-07-05 | 8 | 2. | 33 | 2. | 67 | 1. | |||
2024-07-06 | 3 | 1. | 00 | 1. | 00 | 0. | |||
2024-07-07 | 8 | 2. | 00 | 1. | 67 | 1. | |||
2024-07-08 | 10 | 2. | 33 | 2. | 33 | 2. | |||
2024-07-09 | 6 | 2. | 00 | 2. | 00 | 1. | |||
2024-07-10 | 6 | 2. | 00 | 1. | 67 | 1. | |||
2024-07-11 | 6 | 2. | 33 | 1. | 67 | 1. | |||
2024-07-12 | 5 | 2. | 33 | 1. | 67 | 2. | |||
2024-07-13 | 4 | 1. | 33 | 1. | 00 | 1. | |||
2024-07-14 | 5 | 1. | 00 | 1. | 00 | 1. | |||
2024-07-15 | 7 | 1. | 33 | 1. | 67 | 1. | |||
2024-07-16 | 10 | 3. | 33 | 2. | 00 | 2. | |||
2024-07-17 | 5 | 1. | 33 | 1. | 67 | 2. | |||
2024-07-18 | 5 | 1. | 00 | 1. | 00 | 1. | |||
2024-07-19 | 5 | 1. | 00 | 1. | 33 | 1. | |||
2024-07-20 | 7 | 2. | 33 | 2. | 00 | 2. | |||
2024-07-21 | 5 | 1. | 67 | 1. | 00 | 1. | |||
2024-07-22 | 9 | 2. | 00 | 1. | 33 | 2. | |||
2024-07-23 | 5 | 1. | 00 | 1. | 00 | 0. | |||
2024-07-24 | 6 | 2. | 00 | 1. | 67 | 1. | |||
2024-07-25 | 9 | 1. | 33 | 1. | 67 | 1. | |||
2024-07-26 | 23 | 3. | 67 | 4. | 67 | 4. | |||
2024-07-27 | 18 | 1. | 67 | 2. | 67 | 2. |
Date | A | K-indices | |||||||
---|---|---|---|---|---|---|---|---|---|
2024-06-28 | 32 | 3 | 4 | 3 | 5 | 6 | 4 | 4 | 3 |
2024-06-29 | 11 | 3 | 2 | 2 | 3 | 3 | 2 | 3 | 2 |
2024-06-30 | 10 | 2 | 3 | 1 | 2 | 3 | 3 | 2 | 2 |
2024-07-01 | 5 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 |
2024-07-02 | 6 | 1 | 2 | 1 | 2 | 3 | 1 | 1 | 2 |
2024-07-03 | 6 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 |
2024-07-04 | 10 | 2 | 3 | 2 | 2 | 2 | 2 | 3 | 3 |
2024-07-05 | 10 | 3 | 3 | 2 | 3 | 3 | 2 | 1 | 1 |
2024-07-06 | 4 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 |
2024-07-07 | 7 | 2 | 1 | 2 | 1 | 2 | 2 | 2 | 3 |
2024-07-08 | 11 | 2 | 2 | 2 | 3 | 4 | 2 | 2 | 2 |
2024-07-09 | 8 | 2 | 2 | 1 | 2 | 3 | 2 | 2 | 2 |
2024-07-10 | 8 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 2 |
2024-07-11 | 7 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
2024-07-12 | 7 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 2 |
2024-07-13 | 6 | 1 | 1 | 1 | 1 | 3 | 2 | 2 | 1 |
2024-07-14 | 9 | 1 | 1 | 1 | 3 | 3 | 2 | 3 | 2 |
2024-07-15 | 8 | 1 | 1 | 2 | 1 | 3 | 2 | 2 | 3 |
2024-07-16 | 12 | 3 | 2 | 2 | 2 | 4 | 3 | 2 | 2 |
2024-07-17 | 7 | 1 | 2 | 2 | 1 | 3 | 2 | 2 | 1 |
2024-07-18 | 4 | 0 | 0 | 1 | 2 | 2 | 1 | 2 | 1 |
2024-07-19 | 5 | 1 | 1 | 1 | 2 | 2 | 1 | 2 | 2 |
2024-07-20 | 8 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 2 |
2024-07-21 | 9 | 0 | 1 | 0 | 3 | 3 | 2 | 4 | 2 |
2024-07-22 | 9 | 2 | 2 | 2 | 3 | 3 | 2 | 2 | 2 |
2024-07-23 | 8 | 1 | 1 | 1 | 3 | 3 | 2 | 3 | 1 |
2024-07-24 | 8 | 2 | 2 | 2 | 2 | 3 | 2 | 2 | 2 |
2024-07-25 | 9 | 1 | 1 | 1 | 1 | 3 | 3 | 3 | 3 |
2024-07-26 | 23 | 3 | 5 | 4 | 3 | 4 | 4 | 3 | 2 |
2024-07-27 | 2 | 3 | 3 | 3 |
Date | A | K-indices | |||||||
---|---|---|---|---|---|---|---|---|---|
2024-06-28 | 36 | 4 | 4 | 4 | 6 | 5 | 4 | 4 | 4 |
2024-06-29 | 19 | 4 | 2 | 2 | 4 | 4 | 4 | 3 | 3 |
2024-06-30 | 17 | 3 | 2 | 2 | 3 | 4 | 5 | 2 | 2 |
2024-07-01 | 14 | 2 | 3 | 4 | 4 | 3 | 3 | 1 | 1 |
2024-07-02 | 4 | 2 | 2 | 1 | 0 | 2 | 0 | 1 | 1 |
2024-07-03 | 3 | 2 | 2 | 1 | 0 | 1 | 0 | 1 | 1 |
2024-07-04 | 15 | 2 | 2 | 2 | 1 | 4 | 5 | 3 | 1 |
2024-07-05 | 7 | 2 | 3 | 2 | 2 | 2 | 1 | 1 | 1 |
2024-07-06 | 2 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 |
2024-07-07 | 5 | 2 | 2 | 2 | 0 | 1 | 1 | 2 | 2 |
2024-07-08 | 14 | 3 | 2 | 2 | 5 | 3 | 2 | 2 | 2 |
2024-07-09 | 9 | 2 | 2 | 1 | 4 | 3 | 1 | 1 | 1 |
2024-07-10 | 5 | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 1 |
2024-07-11 | 4 | 1 | 2 | 2 | 0 | 1 | 1 | 1 | 1 |
2024-07-12 | 6 | 2 | 2 | 3 | 1 | 1 | 1 | 1 | 1 |
2024-07-13 | 2 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 |
2024-07-14 | 2 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 |
2024-07-15 | 3 | 1 | 2 | 1 | 0 | 0 | 0 | 1 | 2 |
2024-07-16 | 8 | 3 | 2 | 2 | 2 | 1 | 2 | 2 | 2 |
2024-07-17 | 7 | 1 | 3 | 2 | 2 | 3 | 2 | 1 | 0 |
2024-07-18 | 4 | 1 | 1 | 2 | 1 | 2 | 1 | 1 | 0 |
2024-07-19 | 3 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
2024-07-20 | 7 | 2 | 2 | 2 | 3 | 1 | 1 | 2 | 1 |
2024-07-21 | 2 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 1 |
2024-07-22 | 16 | 2 | 2 | 3 | 5 | 4 | 3 | 2 | 1 |
2024-07-23 | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 2 | 1 |
2024-07-24 | 4 | 1 | 2 | 1 | 1 | 2 | 1 | 1 | 1 |
2024-07-25 | 7 | 1 | 2 | 1 | 0 | 1 | 2 | 3 | 3 |
2024-07-26 | 38 | 4 | 5 | 4 | 5 | 5 | 6 | 3 | 2 |
2024-07-27 | 1 | 3 | 4 | 6 |
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.
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