| 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 | 20h 59m | 03d 15h | sudden | +53 | 135 | -1 | 65 | ||
| Memambetsu | 20h 59m | 03d 15m | sudden | +61 | 150 | -1 | 36 | ||
| Kanoya | 20h 59m | 03d 15h | sudden | +66 | 157 | -1 | 67 | ||
(*) 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 1 September 2025.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 1 September 2025.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 1 September 2025.
*) 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 | 14.7h m | 16d 15h | gradual | 121 | -1 | 84 | |||
| Memambetsu | 14.7h m | 16d 15m | gradual | 143 | -1 | 35 | |||
| Kanoya | 14.7h m | 16d 15h | gradual | 137 | -1 | 83 | |||
(*) 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 September 2025.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 14 September 2025.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 14 September 2025.
*) 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 | 06.5h m | 05d 18h | gradual | 130 | -1 | 80 | |||
| Memambetsu | 06.5h m | 05d 18m | gradual | 132 | -1 | 46 | |||
| Kanoya | 06.5h m | 05d 18h | gradual | 132 | -1 | 82 | |||
(*) 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 29 September 2025.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 29 September 2025.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 29 September 2025.
*) Plot diagram opens in a separate window.
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