SettingsLast update:
| Time UTC | DSCOVR | ACE | ||||
|---|---|---|---|---|---|---|
| Solar Wind | GSM | Solar Wind | GSM | |||
| Proton Density | Bulk Speed | Bz | Proton Density | Bulk Speed | Bz | |
| 08:07 | - | - | - | - | - | - |
| 08:06 | - | - | - | - | - | - |
| 08:05 | 4.70 | 478.3 | - | - | - | - |
| 08:04 | 4.71 | 472.7 | - | - | - | - |
| 08:03 | 12.16 | 487.8 | -11.44 | - | - | - |
| 08:02 | 9.00 | 460.6 | -11.94 | - | - | - |
| 08:01 | 5.01 | 451.9 | -11.12 | - | - | - |
| 08:00 | 5.11 | 460.2 | -11.02 | - | - | - |
| 07:59 | 5.67 | 462.6 | -10.72 | - | - | - |
| 07:58 | 6.12 | 464.0 | -11.16 | - | - | - |
| 07:57 | 5.73 | 457.9 | -10.95 | - | - | - |
| 07:56 | 6.04 | 466.6 | -10.97 | - | - | - |
| 07:55 | 1.82 | 457.2 | -10.49 | - | - | - |
| 07:54 | 1.75 | 453.8 | -9.79 | - | - | - |
| 07:53 | 0.99 | 416.6 | 0.94 | - | - | - |
| 07:52 | 0.96 | 456.1 | 16.85 | - | - | - |
| 07:51 | 2.03 | 458.1 | 20.60 | - | - | - |
| 07:50 | 3.78 | 428.2 | 21.21 | - | - | - |
| 07:49 | 7.55 | 478.9 | 20.01 | - | - | - |
| 07:48 | 7.96 | 481.2 | 9.85 | - | - | - |
| 07:47 | 12.20 | 469.7 | 4.67 | 12.2 | 469.7 | 4.7 |
| 07:46 | 13.05 | 453.1 | 6.60 | 13.1 | 453.1 | 6.6 |
| 07:45 | 23.42 | 464.3 | 12.50 | 23.4 | 464.3 | 12.5 |
| 07:44 | 20.61 | 489.2 | 3.25 | 20.6 | 489.2 | 3.2 |
| 07:43 | 8.62 | 474.0 | 6.90 | 8.6 | 474.0 | 6.9 |
| 07:42 | 18.57 | 454.6 | 8.74 | 18.6 | 454.6 | 8.7 |
| 07:41 | 28.92 | 478.0 | 9.84 | 28.9 | 478.0 | 9.8 |
| 07:40 | 12.36 | 458.6 | 18.13 | 12.4 | 458.6 | 18.1 |
| 07:39 | 10.07 | 444.0 | 17.71 | 10.1 | 444.0 | 17.7 |
| 07:38 | 10.67 | 490.7 | 18.02 | 10.7 | 490.7 | 18.0 |
| 07:37 | 8.09 | 484.7 | 17.47 | 8.1 | 484.7 | 17.5 |
| 07:36 | 8.48 | 478.2 | 16.85 | 8.5 | 478.2 | 16.8 |
| 07:35 | 8.09 | 453.6 | 15.46 | 8.1 | 453.6 | 15.5 |
| 07:34 | 7.77 | 487.1 | 14.78 | 7.8 | 487.1 | 14.8 |
| 07:33 | 5.38 | 503.9 | 14.52 | 5.4 | 503.9 | 14.5 |
| 07:32 | 26.89 | 470.0 | 12.07 | 26.9 | 470.0 | 12.1 |
| 07:31 | 14.47 | 481.7 | 11.69 | 14.5 | 481.7 | 11.7 |
| 07:30 | 17.87 | 495.8 | 14.07 | 17.9 | 495.8 | 14.1 |
| 07:29 | 16.56 | 508.3 | 12.39 | 15.3 | 494.2 | 12.4 |
| 07:28 | 8.55 | 484.7 | 13.40 | 7.4 | 471.5 | 13.4 |
| 07:27 | 4.64 | 450.1 | 10.49 | 7.9 | 471.6 | 10.5 |
| 07:26 | 15.43 | 509.8 | 7.25 | 15.4 | 509.8 | 7.2 |
| 07:25 | 23.76 | 516.6 | 5.51 | 23.8 | 516.6 | 5.5 |
| 07:24 | 8.62 | 489.5 | 6.43 | 8.6 | 489.5 | 6.4 |
| 07:23 | 7.39 | 468.4 | 8.98 | 7.4 | 468.4 | 9.0 |
| 07:22 | 5.09 | 528.6 | 12.08 | 5.1 | 528.6 | 12.1 |
| 07:21 | 5.09 | 527.4 | 12.32 | 5.1 | 527.4 | 12.3 |
| 07:20 | 5.34 | 459.1 | 12.11 | 5.3 | 459.1 | 12.1 |
| 07:19 | 5.56 | 488.3 | 10.86 | 5.6 | 488.3 | 10.9 |
| 07:18 | 23.42 | 508.3 | 9.60 | 23.4 | 508.3 | 9.6 |
| 07:17 | 10.70 | 479.9 | 11.63 | 10.7 | 479.9 | 11.6 |
| 07:16 | 6.54 | 484.3 | 13.47 | 6.5 | 484.3 | 13.5 |
| 07:15 | 6.01 | 503.1 | 12.58 | 6.0 | 503.1 | 12.6 |
| 07:14 | 6.08 | 519.1 | 10.25 | 6.1 | 519.1 | 10.2 |
| 07:13 | 6.27 | 507.8 | 4.92 | 6.3 | 507.8 | 4.9 |
| 07:12 | 21.13 | 493.5 | 7.67 | 21.1 | 493.5 | 7.7 |
| 07:11 | 27.68 | 491.7 | 8.58 | 27.7 | 491.7 | 8.6 |
| 07:10 | 13.58 | 492.2 | 11.08 | 13.6 | 492.2 | 11.1 |
| 07:09 | 11.79 | 491.0 | 12.80 | 11.8 | 491.0 | 12.8 |
| 07:08 | 12.14 | 482.4 | 10.69 | 12.1 | 482.4 | 10.7 |
| 07:07 | 10.02 | 499.2 | 9.48 | 10.0 | 499.2 | 9.5 |
| 07:06 | 4.65 | 501.8 | 8.37 | 4.6 | 501.8 | 8.4 |
| 07:05 | 5.20 | 441.0 | 6.23 | 5.2 | 441.0 | 6.2 |
| 07:04 | 4.97 | 489.0 | 3.60 | 5.0 | 489.0 | 3.6 |
| 07:03 | 22.09 | 505.5 | 5.04 | 22.1 | 505.5 | 5.0 |
| 07:02 | 8.95 | 479.7 | 5.60 | 8.9 | 479.7 | 5.6 |
| 07:01 | 4.41 | 457.7 | 4.89 | 4.4 | 457.7 | 4.9 |
| 07:00 | 4.27 | 495.0 | 3.75 | 4.3 | 495.0 | 3.8 |
| 06:59 | 4.40 | 516.1 | 1.47 | 4.4 | 516.1 | 1.5 |
| 06:58 | 4.67 | 475.3 | -0.11 | 4.7 | 475.3 | -0.1 |
| 06:57 | 4.70 | 466.8 | 0.32 | 4.7 | 466.8 | 0.3 |
| 06:56 | 5.68 | 504.5 | 0.04 | 5.7 | 504.5 | 0.0 |
| 06:55 | 6.98 | 499.7 | -2.04 | 7.0 | 499.7 | -2.0 |
| 06:54 | 6.66 | 468.0 | -3.59 | 6.7 | 468.0 | -3.6 |
| 06:53 | 5.65 | 485.4 | -2.68 | 5.7 | 485.4 | -2.7 |
| 06:52 | 6.00 | 497.9 | -2.39 | 6.0 | 497.9 | -2.4 |
| 06:51 | 7.85 | 515.0 | -2.71 | 7.9 | 515.0 | -2.7 |
| 06:50 | 7.95 | 451.2 | -4.31 | 7.9 | 451.2 | -4.3 |
| 06:49 | 8.09 | - | -4.74 | 8.1 | - | -4.7 |
| 06:48 | 8.09 | 485.7 | -5.30 | 8.1 | 485.7 | -5.3 |
| 06:47 | 7.77 | 464.3 | -5.73 | 7.8 | 464.3 | -5.7 |
| 06:46 | 7.88 | 487.0 | -7.24 | 7.9 | 487.0 | -7.2 |
| 06:45 | 7.91 | 511.8 | -9.08 | 7.9 | 511.8 | -9.1 |
| 06:44 | 8.45 | 524.9 | -8.46 | 8.4 | 524.9 | -8.5 |
| 06:43 | 6.79 | 474.5 | -8.05 | 6.8 | 474.5 | -8.0 |
| 06:42 | 6.12 | 482.6 | -0.49 | 6.1 | 482.6 | -0.5 |
| 06:41 | 5.46 | 496.1 | -0.23 | 5.5 | 496.1 | -0.2 |
| 06:40 | 5.44 | 495.6 | 0.07 | 5.4 | 495.6 | 0.1 |
| 06:39 | 5.50 | 482.9 | 1.13 | 5.5 | 482.9 | 1.1 |
| 06:38 | 4.99 | 475.1 | 0.70 | 5.0 | 475.1 | 0.7 |
| 06:37 | 5.48 | 504.0 | 1.05 | 5.5 | 504.0 | 1.1 |
| 06:36 | 5.27 | 486.8 | 2.60 | 5.3 | 486.8 | 2.6 |
| 06:35 | 6.19 | 464.0 | 1.97 | 6.2 | 464.0 | 2.0 |
| 06:34 | 7.95 | 503.3 | 0.18 | 7.9 | 503.3 | 0.2 |
| 06:33 | 9.07 | 506.0 | 3.35 | 9.1 | 506.0 | 3.3 |
| 06:32 | 7.96 | 522.2 | 3.52 | 8.0 | 522.2 | 3.5 |
| 06:31 | 6.03 | 466.4 | 4.70 | 6.0 | 466.4 | 4.7 |
| 06:30 | 6.02 | 499.1 | 4.37 | 6.0 | 499.1 | 4.4 |
| 06:29 | 6.79 | 514.8 | 3.04 | 6.8 | 514.8 | 3.0 |
| 06:28 | 7.23 | 464.9 | 2.57 | 7.2 | 464.9 | 2.6 |
| 06:27 | 6.50 | 480.3 | 4.83 | 6.5 | 480.3 | 4.8 |
| 06:26 | 6.31 | 500.3 | -0.01 | 6.3 | 500.3 | -0.0 |
| 06:25 | 6.35 | 500.5 | - | 6.4 | 500.5 | - |
| 06:24 | 6.73 | 486.8 | - | 6.7 | 486.8 | - |
| 06:23 | 7.79 | 488.9 | - | 7.8 | 488.9 | - |
| 06:22 | 5.78 | 473.5 | - | 5.8 | 473.5 | - |
| 06:21 | 2.61 | 431.9 | - | 2.6 | 431.9 | - |
| 06:20 | 7.96 | 492.4 | - | 8.0 | 492.4 | - |
| 06:19 | 8.50 | 491.8 | - | 8.5 | 491.8 | - |
| 06:18 | 8.19 | 491.9 | - | 8.2 | 491.9 | - |
| 06:17 | 1.25 | 428.7 | - | 1.3 | 428.7 | - |
| 06:16 | - | - | - | - | - | - |
| 06:15 | 0.62 | 405.0 | - | 0.6 | 405.0 | - |
| 06:14 | 16.57 | 475.6 | - | 16.6 | 475.6 | - |
| 06:13 | 10.86 | 444.3 | - | 10.9 | 444.3 | - |
| 06:12 | 8.20 | 470.1 | - | 8.2 | 470.1 | - |
| 06:11 | 8.42 | 492.0 | - | 8.4 | 492.0 | - |
| 06:10 | 3.68 | 443.1 | - | 3.7 | 443.1 | - |
| 06:09 | 4.66 | 454.9 | - | 4.7 | 454.9 | - |
| 06:08 | 4.40 | 452.0 | - | 4.4 | 452.0 | - |
Built 2026-03-21 08:08 from source
| Solar wind parameters of the latest hour by NOAA | |||
|---|---|---|---|
| parameter | min | max | mean |
| IMF Bz [nT] | -11.0 | 21.2 | 9.4 |
| velocity [km/s] | 416.6 | 528.6 | 479.7 |
| density [cm-3] | 1.0 | 28.9 | 10.4 |
| Geomagnetic activity (RX [nT]) | ||
|---|---|---|
| site | latest hour | next hour (RXmin, RXmax) |
| Kevo (KEV) | 168 | 8 | 57 |
| Maasi (MAS) | 200 | 8 | 56 |
| Kilpisjärvi (KIL) | 176 | 8 | 61 |
| Ivalo (IVA) | 123 | 7 | 60 |
| Muonio (MUO) | 109 | 7 | 53 |
| Sodankylä (SOD) | 93 | 7 | 53 |
| Pello (PEL) | 92 | 7 | 53 |
| Oulujärvi (OUJ) | 45 | 7 | 44 |
| Mekrijärvi (MEK) | 25 | 4 | 56 |
| Hankasalmi (HAN) | 38 | 6 | 21 |
| Nurmijärvi (NUR) | 18 | 7 | 38 |
| Tartu (TAR) | 18 | 5 | 32 |
| low | increased | moderate | high | very high |
Short explanation of the method
AurorasNow! (Finnish Meteorological Institute)Built 2026-03-21 08:02 from source
Issue Time: 2026-03-21 07:53 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-21 07:52 UTC
Synoptic Period: 0600-0900 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: 2026-03-21 07:52 UTC
Synoptic Period: 0600-0900 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: 2026-03-21 05:17 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 645
Valid From: 2026-03-20 20:20 UTC
Now Valid Until: 2026-03-21 15:00 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: 645
Valid From: 2026-03-20 20:20 UTC
Now Valid Until: 2026-03-21 15:00 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: 2026-03-21 05:17 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-21 05:14 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: 2026-03-21 05:14 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: 2026-03-21 05:17 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2208
Valid From: 2026-03-20 19:30 UTC
Now Valid Until: 2026-03-21 18:00 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: 2208
Valid From: 2026-03-20 19:30 UTC
Now Valid Until: 2026-03-21 18:00 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: 2026-03-21 05:17 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5290
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 23:59 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: 5290
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 23:59 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: 2026-03-21 03:32 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-21 03:31 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: 2026-03-21 03:31 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: 2026-03-21 01:54 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-03-21 01:54 UTC
Synoptic Period: 0000-0300 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: 2026-03-21 01:54 UTC
Synoptic Period: 0000-0300 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: 2026-03-21 01:41 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-21 01:41 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: 2026-03-21 01:41 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: 2026-03-21 00:34 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-21 00:33 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: 2026-03-21 00:33 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: 2026-03-20 23:29 UTC
ALERT: Geomagnetic K-index of 7
Threshold Reached: 2026-03-20 23:28 UTC
Synoptic Period: 2100-2400 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: 2026-03-20 23:28 UTC
Synoptic Period: 2100-2400 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: 2026-03-20 23:05 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026-03-20 23:05 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
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: 2026-03-20 23:05 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
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: 2026-03-20 22:12 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-20 22:08 UTC
Synoptic Period: 2100-2400 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: 2026-03-20 22:08 UTC
Synoptic Period: 2100-2400 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: 2026-03-20 21:36 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-20 21:26 UTC
Synoptic Period: 2100-2400 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: 2026-03-20 21:26 UTC
Synoptic Period: 2100-2400 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: 2026-03-20 21:09 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026-03-20 20:53 UTC
Deviation: 56 nT
Station: BOU
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026-03-20 20:53 UTC
Deviation: 56 nT
Station: BOU
Issue Time: 2026-03-20 21:04 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026-03-20 20:59 UTC
Synoptic Period: 1800-2100 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: 2026-03-20 20:59 UTC
Synoptic Period: 1800-2100 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: 2026-03-20 20:43 UTC
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Mar 20: G3 (Strong) Mar 21: G3 (Strong) Mar 22: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: G3 (Strong) geomagnetic storming is likely due to combined CME effects from events that left the Sun on 16 and 18 Mar.
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.
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day
Mar 20: G3 (Strong) Mar 21: G3 (Strong) Mar 22: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: G3 (Strong) geomagnetic storming is likely due to combined CME effects from events that left the Sun on 16 and 18 Mar.
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: 2026-03-20 20:40 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026-03-20 20:50 UTC
Valid To: 2026-03-20 21:20 UTC
IP Shock Passage Observed: 2026-03-20 21:18 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026-03-20 20:50 UTC
Valid To: 2026-03-20 21:20 UTC
IP Shock Passage Observed: 2026-03-20 21:18 UTC
Issue Time: 2026-03-20 20:22 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2026-03-20 20:20 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Comment: G2 (Moderate) geomagnetic storm conditions are expected into the the early portions of 21 Mar (UTC) due to CME effects.
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: 2026-03-20 20:20 UTC
Valid To: 2026-03-21 06:00 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
Comment: G2 (Moderate) geomagnetic storm conditions are expected into the the early portions of 21 Mar (UTC) due to CME effects.
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: 2026-03-20 20:18 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026-03-20 20:18 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: 2026-03-20 20:18 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.
Issue Time: 2026-03-20 19:32 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026-03-20 19:30 UTC
Valid To: 2026-03-21 09:00 UTC
Warning Condition: Onset
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.
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026-03-20 19:30 UTC
Valid To: 2026-03-21 09:00 UTC
Warning Condition: Onset
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: 2026-03-20 14:55 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3651
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 4941 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3651
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 4941 pfu
Issue Time: 2026-03-20 12:39 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5289
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 12:00 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: 5289
Valid From: 2026-03-20 07:19 UTC
Now Valid Until: 2026-03-21 12:00 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: 2026-03-20 08:54 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026-03-20 08:54 UTC
Synoptic Period: 0600-0900 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: 2026-03-20 08:54 UTC
Synoptic Period: 0600-0900 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: 2026-03-20 07:18 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026-03-20 07:19 UTC
Valid To: 2026-03-20 15:00 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: 2026-03-20 07:19 UTC
Valid To: 2026-03-20 15:00 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: 2026-03-19 04:59 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3650
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 2949 pfu
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3650
Begin Time: 2026-03-15 16:30 UTC
Yesterday Maximum 2MeV Flux: 2949 pfu
Issue Time: 2026-03-18 21:14 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Mar 19: G2 (Moderate) Mar 20: G2 (Moderate) Mar 21: G2 (Moderate)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day
Mar 19: G2 (Moderate) Mar 20: G2 (Moderate) Mar 21: G2 (Moderate)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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: 2026-03-18 09:03 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2026-03-18 08:33 UTC
Maximum Time: 2026-03-18 08:35 UTC
End Time: 2026-03-18 08:39 UTC
Duration: 6 minutes
Peak Flux: 229 sfu
Latest Penticton Noon Flux: 111 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
SUMMARY: 10cm Radio Burst
Begin Time: 2026-03-18 08:33 UTC
Maximum Time: 2026-03-18 08:35 UTC
End Time: 2026-03-18 08:39 UTC
Duration: 6 minutes
Peak Flux: 229 sfu
Latest Penticton Noon Flux: 111 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.
Issue Time: 2026-03-18 08:59 UTC
ALERT: Type II Radio Emission
Begin Time: 2026-03-18 08:40 UTC
Estimated Velocity: 866 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: 2026-03-18 08:40 UTC
Estimated Velocity: 866 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.
Built 2026-03-21 07:56 from source
