| Observatory | Commencing time | Ending time | Geomagnetic field | Geoelectric field | |||||
| Type (sudden/gradual) | Amplitude of abrupt onset H (nT) g(nT) |
Range | Range | ||||||
| Hour Minute (UTC) |
Date Time (UTC) |
Horizontal component H (nT) |
Declination D (arcminute) |
Vertical component Z (nT) |
East-west component (mV/km) |
North-south component (mV/km) |
|||
| Kakioka | 15h 05m | 05d 21h | sudden | +17 | 92 | 10.5 | 46 | ||
| Memambetsu | 15h 05m | 05d 21h | sudden | +23 | 96 | 13.9 | 18 | ||
| Kanoya | 15h 05m | 05d 21h | sudden | +19 | 108 | 9.1 | 65 | ||
(*) Time is in UTC (Universal Time Coordinated).
(*) Time is given in 1-minute increments for the sudden commencement type and in 0.1-hour increments for the gradual commencement type.
(*) "-1" is displayed for the range, when it is unknown due to missing measurements, etc.
(*) The range may not be determined for a storm which is followed by the next one before its ending (the ending time is indicated by "C").
Plot of Kakioka 1-minute geomagnetic field for the geomagnetic storm on 4 February 2026.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 4 February 2026.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 4 February 2026.
*) Plot diagram opens in a separate window.
| Observatory | Commencing time | Ending time | Geomagnetic field | Geoelectric field | |||||
| Type (sudden/gradual) | Amplitude of abrupt onset H (nT) g(nT) |
Range | Range | ||||||
| Hour Minute (UTC) |
Date Time (UTC) |
Horizontal component H (nT) |
Declination D (arcminute) |
Vertical component Z (nT) |
East-west component (mV/km) |
North-south component (mV/km) |
|||
| Kakioka | 21.0h m | 17d 00h | gradual | 95 | 7.5 | 46 | |||
| Memambetsu | 21.0h m | 17d 00h | gradual | 115 | 11.8 | 23 | |||
| Kanoya | 21.0h m | 17d 00h | gradual | 91 | 5.9 | 43 | |||
(*) Time is in UTC (Universal Time Coordinated).
(*) Time is given in 1-minute increments for the sudden commencement type and in 0.1-hour increments for the gradual commencement type.
(*) "-1" is displayed for the range, when it is unknown due to missing measurements, etc.
(*) The range may not be determined for a storm which is followed by the next one before its ending (the ending time is indicated by "C").
Plot of Kakioka 1-minute geomagnetic field for the geomagnetic storm on 14 February 2026.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 14 February 2026.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 14 February 2026.
*) Plot diagram opens in a separate window.
| Observatory | Commencing time | Ending time | Geomagnetic field | Geoelectric field | |||||
| Type (sudden/gradual) | Amplitude of abrupt onset H (nT) g(nT) |
Range | Range | ||||||
| Hour Minute (UTC) |
Date Time (UTC) |
Horizontal component H (nT) |
Declination D (arcminute) |
Vertical component Z (nT) |
East-west component (mV/km) |
North-south component (mV/km) |
|||
| Kakioka | 02.1h m | 24d 15h | gradual | 85 | 7.2 | 58 | |||
| Memambetsu | 02.1h m | 24d 15h | gradual | 99 | 9.8 | 34 | |||
| Kanoya | 02.1h m | 24d 15h | gradual | 97 | 7.1 | 57 | |||
(*) Time is in UTC (Universal Time Coordinated).
(*) Time is given in 1-minute increments for the sudden commencement type and in 0.1-hour increments for the gradual commencement type.
(*) "-1" is displayed for the range, when it is unknown due to missing measurements, etc.
(*) The range may not be determined for a storm which is followed by the next one before its ending (the ending time is indicated by "C").
Plot of Kakioka 1-minute geomagnetic field for the geomagnetic storm on 22 February 2026.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 22 February 2026.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 22 February 2026.
*) Plot diagram opens in a separate window.
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