SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 22:09 | - | - | - | - | - | - |
| 22:08 | - | - | - | - | - | - |
| 22:07 | - | - | - | - | - | - |
| 22:06 | 2.21 | 391.7 | -1.35 | - | - | - |
| 22:05 | 3.31 | 405.2 | -1.87 | - | - | - |
| 22:04 | 3.41 | 403.9 | -2.29 | - | - | - |
| 22:03 | 3.62 | 410.0 | -2.28 | - | - | - |
| 22:02 | 3.19 | 401.8 | -2.57 | - | - | - |
| 22:01 | 2.94 | 399.1 | -2.56 | - | - | - |
| 22:00 | 3.38 | 402.5 | -2.55 | - | - | - |
| 21:59 | 3.77 | 409.2 | -3.09 | - | - | - |
| 21:58 | 3.27 | 403.7 | -2.78 | - | - | - |
| 21:57 | 3.05 | 401.4 | -1.81 | - | - | - |
| 21:56 | 3.13 | 401.5 | -1.72 | - | - | - |
| 21:55 | 3.57 | 406.4 | -2.28 | - | - | - |
| 21:54 | 3.45 | 403.4 | -1.10 | - | - | - |
| 21:53 | 3.09 | 401.2 | -2.00 | - | - | - |
| 21:52 | 3.00 | 397.5 | -2.32 | - | - | - |
| 21:51 | 2.59 | 398.5 | -2.53 | - | - | - |
| 21:50 | 4.31 | 405.3 | -2.68 | - | - | - |
| 21:49 | 3.51 | 400.1 | -2.76 | - | - | - |
| 21:48 | 3.08 | 402.2 | -2.88 | - | - | -3.0 |
| 21:47 | 3.07 | 402.0 | -3.06 | 0.1 | 389.8 | -3.1 |
| 21:46 | 3.38 | 404.1 | -2.94 | 0.1 | 397.9 | -2.7 |
| 21:45 | 3.64 | 404.7 | -2.86 | 0.1 | 392.5 | -2.7 |
| 21:44 | 2.60 | 394.1 | -2.39 | 0.2 | 377.1 | -2.6 |
| 21:43 | 2.84 | 403.2 | -2.70 | 0.3 | 372.5 | -1.6 |
| 21:42 | 2.68 | 403.3 | -2.52 | 0.2 | 388.7 | -1.3 |
| 21:41 | 2.51 | 402.2 | -1.96 | 0.1 | 399.2 | -3.1 |
| 21:40 | 2.48 | 400.6 | -1.28 | 0.1 | 394.0 | -3.0 |
| 21:39 | 2.95 | 405.1 | -1.82 | 0.1 | 393.9 | -3.2 |
| 21:38 | - | - | - | 0.1 | 382.7 | -3.2 |
| 21:37 | 2.57 | 402.6 | -2.01 | 0.1 | 390.4 | -3.1 |
| 21:36 | 2.50 | 403.1 | -2.24 | 0.1 | 386.2 | -2.9 |
| 21:35 | 2.91 | 405.0 | -2.96 | 0.2 | 398.9 | -2.7 |
| 21:34 | 2.72 | 405.5 | -2.72 | - | - | -2.5 |
| 21:33 | 2.92 | 404.3 | -2.54 | 0.2 | 400.4 | -2.4 |
| 21:32 | 2.74 | 403.0 | -2.40 | 0.2 | 403.3 | -2.4 |
| 21:31 | 2.88 | 402.0 | -2.49 | 0.2 | 399.0 | -1.8 |
| 21:30 | 3.02 | 406.5 | -2.81 | 0.2 | 399.7 | -2.2 |
| 21:29 | 3.05 | 403.6 | -2.64 | 0.2 | 399.3 | -2.1 |
| 21:28 | 3.08 | 402.5 | -2.69 | 0.2 | 395.3 | -2.2 |
| 21:27 | 2.88 | 406.1 | -2.90 | 0.2 | 395.0 | -2.2 |
| 21:26 | 3.45 | 410.5 | -3.17 | 0.2 | 394.0 | -2.2 |
| 21:25 | 3.87 | 414.2 | -2.63 | 0.2 | 393.4 | -2.1 |
| 21:24 | 3.00 | 408.4 | -1.21 | 0.4 | 389.8 | -2.1 |
| 21:23 | 2.95 | 408.6 | -1.16 | 0.5 | 380.3 | -1.4 |
| 21:22 | 3.29 | 408.9 | -1.47 | 0.1 | 395.6 | -2.1 |
| 21:21 | 3.10 | 405.8 | -1.80 | 0.1 | 398.6 | -1.9 |
| 21:20 | 2.91 | 406.1 | -1.63 | 0.1 | 401.6 | -2.2 |
| 21:19 | 2.98 | 406.7 | -1.80 | 0.1 | 412.5 | -2.3 |
| 21:18 | 3.47 | 414.1 | -1.98 | 0.1 | 408.7 | -2.7 |
| 21:17 | 3.83 | 415.1 | -2.30 | 0.1 | 399.0 | -2.4 |
| 21:16 | 3.79 | 414.5 | -2.93 | 0.1 | 401.2 | -2.8 |
| 21:15 | 3.07 | 410.1 | -3.36 | 0.1 | 392.8 | -2.6 |
| 21:14 | 3.83 | 416.6 | -3.31 | 0.2 | 396.9 | -2.4 |
| 21:13 | 3.61 | 407.5 | -3.50 | 0.1 | 397.2 | -1.8 |
| 21:12 | 3.12 | 415.8 | -3.73 | 0.1 | 396.6 | -1.0 |
| 21:11 | 3.98 | 415.9 | -3.86 | 0.2 | 390.1 | -0.4 |
| 21:10 | 4.15 | 416.3 | -3.84 | 0.3 | 390.4 | -0.1 |
| 21:09 | 4.03 | 416.0 | -3.84 | 0.3 | 398.6 | 2.0 |
| 21:08 | 3.95 | 416.5 | -3.87 | 0.1 | 401.4 | 0.7 |
| 21:07 | 3.97 | 415.3 | -3.92 | 0.1 | 403.6 | -1.3 |
| 21:06 | 3.99 | 416.7 | -3.91 | 0.1 | 401.8 | -2.5 |
| 21:05 | 4.08 | 420.9 | -3.29 | 0.1 | 403.6 | -2.8 |
| 21:04 | 4.25 | 425.8 | -3.19 | 0.1 | 401.9 | -3.3 |
| 21:03 | 4.28 | 425.4 | -3.43 | 0.1 | 398.8 | -3.3 |
| 21:02 | 3.90 | 412.5 | -2.75 | 0.1 | 405.1 | -3.3 |
| 21:01 | 4.24 | 414.8 | -2.12 | 0.1 | 405.1 | -2.5 |
| 21:00 | 4.03 | 413.4 | -2.37 | 0.1 | 409.1 | -3.2 |
| 20:59 | 3.20 | 408.3 | -1.92 | - | - | -3.5 |
| 20:58 | 3.96 | 411.5 | -2.10 | - | - | -3.8 |
| 20:57 | 3.24 | 409.9 | -2.13 | - | - | - |
| 20:56 | 3.69 | 417.1 | -2.12 | - | - | - |
| 20:55 | 4.40 | 422.9 | -2.93 | - | - | - |
| 20:54 | 4.07 | 420.7 | -3.11 | - | - | - |
| 20:53 | 4.12 | 421.6 | -3.33 | - | - | - |
| 20:52 | 4.00 | 413.6 | -2.88 | - | - | - |
| 20:51 | 3.42 | 406.8 | -2.45 | - | - | - |
| 20:50 | 3.62 | 408.9 | -2.53 | - | - | - |
| 20:49 | 4.01 | 417.8 | -1.83 | - | - | - |
| 20:48 | 4.17 | 417.6 | -2.10 | - | - | - |
| 20:47 | 3.86 | 415.9 | -2.15 | - | - | - |
| 20:46 | 4.27 | 417.5 | -2.27 | - | - | - |
| 20:45 | 3.69 | 413.1 | -2.39 | - | - | - |
| 20:44 | 3.65 | 412.6 | -2.46 | - | - | - |
| 20:43 | 3.32 | 412.8 | -2.22 | - | - | - |
| 20:42 | 3.69 | 408.5 | -2.63 | - | - | - |
| 20:41 | 3.07 | 405.3 | -2.62 | - | - | - |
| 20:40 | 3.21 | 406.5 | -3.35 | - | - | - |
| 20:39 | 3.08 | 405.7 | -3.09 | - | - | - |
| 20:38 | 3.04 | 406.9 | -3.30 | - | - | - |
| 20:37 | 3.17 | 407.8 | -3.26 | - | - | - |
| 20:36 | 4.10 | 412.5 | -1.57 | - | - | - |
| 20:35 | 3.59 | 412.5 | -2.60 | - | - | - |
| 20:34 | 3.61 | 413.8 | -2.44 | - | - | - |
| 20:33 | 4.14 | 417.6 | -0.71 | - | - | - |
| 20:32 | 4.28 | 420.8 | -0.32 | - | - | - |
| 20:31 | 4.45 | 423.4 | 0.19 | - | - | - |
| 20:30 | 4.50 | 429.1 | -1.29 | - | - | - |
| 20:29 | 4.42 | 431.2 | -1.70 | - | - | - |
| 20:28 | 4.62 | 434.2 | -1.19 | - | - | - |
| 20:27 | 4.59 | 428.5 | -1.40 | - | - | - |
| 20:26 | 4.63 | 428.2 | -1.53 | - | - | - |
| 20:25 | 4.64 | 432.8 | -2.30 | - | - | - |
| 20:24 | 4.29 | 423.1 | -3.15 | - | - | - |
| 20:23 | 4.21 | 423.9 | -3.12 | - | - | - |
| 20:22 | 4.35 | 421.4 | -3.10 | - | - | - |
| 20:21 | 4.50 | 413.2 | -2.55 | - | - | - |
| 20:20 | 4.04 | 413.5 | -2.04 | - | - | - |
| 20:19 | 4.33 | 415.4 | -1.56 | - | - | - |
| 20:18 | 4.08 | 416.3 | -0.58 | - | - | - |
| 20:17 | 4.09 | 415.8 | -0.50 | - | - | - |
| 20:16 | 4.11 | 415.6 | -0.23 | - | - | - |
| 20:15 | 4.27 | 417.4 | 0.19 | - | - | - |
| 20:14 | 4.17 | 415.4 | 1.33 | - | - | - |
| 20:13 | 4.09 | 415.2 | 0.71 | - | - | - |
| 20:12 | 3.97 | 417.4 | 0.23 | - | - | - |
| 20:11 | 4.14 | 414.9 | 0.84 | - | - | - |
| 20:10 | 4.12 | 414.5 | 1.21 | - | - | - |
Built 2023-09-21 22:10 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | -3.9 | -1.1 | -2.6 |
| velocity [km/s] | 394.1 | 425.8 | 408.3 |
| density [cm-3] | 2.5 | 4.3 | 3.3 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 177 | 18 | 327 |
| Maasi (MAS) | 187 | 19 | 320 |
| Kilpisjärvi (KIL) | 163 | 16 | 321 |
| Ivalo (IVA) | 107 | 10 | 256 |
| Muonio (MUO) | 151 | 9 | 280 |
| Sodankylä (SOD) | 150 | 8 | 238 |
| Pello (PEL) | 123 | 7 | 230 |
| Oulujärvi (OUJ) | 41 | 5 | 104 |
| Mekrijärvi (MEK) | 19 | 3 | 32 |
| Hankasalmi (HAN) | 17 | 3 | 37 |
| Nurmijärvi (NUR) | 14 | 4 | 37 |
| Tartu (TAR) | 12 | 3 | 28 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2023-09-21 22:02 from source
Issue Time: 2023-09-21 20:11 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day
Sep 22: None (Below G1) Sep 23: G1 (Minor) Sep 24: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: 20 Sep CME shock and glancing influences coupled with negative polarity CH HSS influences
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
Highest Storm Level Predicted by Day
Sep 22: None (Below G1) Sep 23: G1 (Minor) Sep 24: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: 20 Sep CME shock and glancing influences coupled with negative polarity CH HSS influences
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.
Issue Time: 2023-09-21 15:14 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3366
Begin Time: 2023-09-19 17:05 UTC
Yesterday Maximum 2MeV Flux: 2923 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3366
Begin Time: 2023-09-19 17:05 UTC
Yesterday Maximum 2MeV Flux: 2923 pfu
Issue Time: 2023-09-21 13:08 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023-09-21 12:42 UTC
Maximum Time: 2023-09-21 12:54 UTC
End Time: 2023-09-21 13:02 UTC
X-ray Class: M8.7
Location: N09E24
NOAA Scale: R2 - Moderate
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023-09-21 12:42 UTC
Maximum Time: 2023-09-21 12:54 UTC
End Time: 2023-09-21 13:02 UTC
X-ray Class: M8.7
Location: N09E24
NOAA Scale: R2 - Moderate
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
Issue Time: 2023-09-21 12:55 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023-09-21 12:51 UTC
NOAA Scale: R2 - Moderate
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023-09-21 12:51 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2023-09-21 01:41 UTC
ALERT: Type IV Radio Emission
Begin Time: 2023-09-20 20:25 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 IV Radio Emission
Begin Time: 2023-09-20 20:25 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.
Issue Time: 2023-09-20 23:12 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2023-09-20 23:12 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
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
Threshold Reached: 2023-09-20 23:12 UTC
Synoptic Period: 2100-2400 UTC
Active Warning: Yes
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2023-09-20 22:54 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2023-09-20 22:55 UTC
Valid To: 2023-09-21 06:00 UTC
Warning Condition: Onset
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
Valid From: 2023-09-20 22:55 UTC
Valid To: 2023-09-21 06:00 UTC
Warning Condition: Onset
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2023-09-20 15:00 UTC
ALERT: Type II Radio Emission
Begin Time: 2023-09-20 14:25 UTC
Estimated Velocity: 1054 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
Begin Time: 2023-09-20 14:25 UTC
Estimated Velocity: 1054 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.
Issue Time: 2023-09-20 14:53 UTC
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023-09-20 14:11 UTC
Maximum Time: 2023-09-20 14:19 UTC
End Time: 2023-09-20 14:25 UTC
X-ray Class: M8.2
Optical Class: 2b
Location: N09E35
NOAA Scale: R2 - Moderate
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
SUMMARY: X-ray Event exceeded M5
Begin Time: 2023-09-20 14:11 UTC
Maximum Time: 2023-09-20 14:19 UTC
End Time: 2023-09-20 14:25 UTC
X-ray Class: M8.2
Optical Class: 2b
Location: N09E35
NOAA Scale: R2 - Moderate
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.
Issue Time: 2023-09-20 14:20 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023-09-20 14:17 UTC
NOAA Scale: R2 - Moderate
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2023-09-20 14:17 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2023-09-20 13:02 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3365
Begin Time: 2023-09-19 17:05 UTC
Yesterday Maximum 2MeV Flux: 2068 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3365
Begin Time: 2023-09-19 17:05 UTC
Yesterday Maximum 2MeV Flux: 2068 pfu
Issue Time: 2023-09-20 08:04 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4455
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-20 18:00 UTC
Warning Condition: Persistence
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
Extension to Serial Number: 4455
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-20 18:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2023-09-19 23:11 UTC
ALERT: Type IV Radio Emission
Begin Time: 2023-09-19 22:37 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 IV Radio Emission
Begin Time: 2023-09-19 22:37 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.
Issue Time: 2023-09-19 23:08 UTC
ALERT: Type II Radio Emission
Begin Time: 2023-09-19 22:36 UTC
Estimated Velocity: 680 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
Begin Time: 2023-09-19 22:36 UTC
Estimated Velocity: 680 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.
Issue Time: 2023-09-19 17:22 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2023-09-19 17:05 UTC
Station: GOES-16
ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2023-09-19 17:05 UTC
Station: GOES-16
Issue Time: 2023-09-19 16:50 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023-09-19 16:44 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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
Threshold Reached: 2023-09-19 16:44 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Issue Time: 2023-09-19 14:53 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4454
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-20 09:00 UTC
Warning Condition: Persistence
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
Extension to Serial Number: 4454
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-20 09:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2023-09-19 14:52 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1811
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 23:59 UTC
Warning Condition: Persistence
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 5 expected
Extension to Serial Number: 1811
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 23:59 UTC
Warning Condition: Persistence
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.
Issue Time: 2023-09-19 13:44 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023-09-19 13:30 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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
Threshold Reached: 2023-09-19 13:30 UTC
Synoptic Period: 1200-1500 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Issue Time: 2023-09-19 05:59 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2023-09-19 05:59 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
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: Geomagnetic K-index of 7
Threshold Reached: 2023-09-19 05:59 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
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.
Issue Time: 2023-09-19 04:33 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 493
Valid From: 2023-09-19 01:05 UTC
Now Valid Until: 2023-09-19 12:00 UTC
Warning Condition: Persistence
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: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 493
Valid From: 2023-09-19 01:05 UTC
Now Valid Until: 2023-09-19 12:00 UTC
Warning Condition: Persistence
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.
Issue Time: 2023-09-19 04:33 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1810
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 15:00 UTC
Warning Condition: Persistence
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 5 expected
Extension to Serial Number: 1810
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 15:00 UTC
Warning Condition: Persistence
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.
Issue Time: 2023-09-19 04:33 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4453
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-19 21:00 UTC
Warning Condition: Persistence
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
Extension to Serial Number: 4453
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-19 21:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2023-09-19 04:05 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2023-09-19 04:04 UTC
Valid To: 2023-09-19 09:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme
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
Valid From: 2023-09-19 04:04 UTC
Valid To: 2023-09-19 09:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater - Strong to Extreme
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.
Issue Time: 2023-09-19 03:36 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023-09-19 03:29 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
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
Threshold Reached: 2023-09-19 03:29 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
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.
Issue Time: 2023-09-19 03:21 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023-09-19 03:21 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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
Threshold Reached: 2023-09-19 03:21 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Issue Time: 2023-09-19 02:16 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2023-09-19 02:16 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
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
Threshold Reached: 2023-09-19 02:16 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
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.
Issue Time: 2023-09-19 01:07 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2023-09-19 01:05 UTC
Valid To: 2023-09-19 06:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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
Valid From: 2023-09-19 01:05 UTC
Valid To: 2023-09-19 06:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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.
Issue Time: 2023-09-19 01:07 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1809
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 12:00 UTC
Warning Condition: Persistence
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 5 expected
Extension to Serial Number: 1809
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 12:00 UTC
Warning Condition: Persistence
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.
Issue Time: 2023-09-19 01:07 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4452
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-19 15:00 UTC
Warning Condition: Persistence
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
Extension to Serial Number: 4452
Valid From: 2023-09-18 01:30 UTC
Now Valid Until: 2023-09-19 15:00 UTC
Warning Condition: Persistence
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Issue Time: 2023-09-19 00:59 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023-09-19 00:58 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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
Threshold Reached: 2023-09-19 00:58 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Issue Time: 2023-09-18 23:44 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1808
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 06:00 UTC
Warning Condition: Persistence
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 5 expected
Extension to Serial Number: 1808
Valid From: 2023-09-18 13:40 UTC
Now Valid Until: 2023-09-19 06:00 UTC
Warning Condition: Persistence
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.
Issue Time: 2023-09-18 20:45 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2023-09-18 20:44 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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
Threshold Reached: 2023-09-18 20:44 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
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.
Built 2023-09-21 20:13 from source
