| 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 | 08h 43m | 11d 24h | sudden | +24 | 354 | 13.9 | 98 | ||
| Memambetsu | 08h 42m | 11d 20m | sudden | +29 | 345 | 18.4 | 72 | ||
| Kanoya | 08h 43m | 09d 24h | sudden | +29 | 102 | 4.5 | 60 | ||
(*) 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 9 April 1990.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 9 April 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 9 April 1990.
*) 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) |
|||
| Kanoya | 00.8h | 11d 21h | gradual | 377 | 13.5 | 89 | |||
(*) 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 Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 10 April 1990.
*) 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 | 03h 26m | 14d 24h | sudden | +35 | 206 | 20.3 | 77 | ||
| Memambetsu | 03h 26m | 15d 07m | sudden | +34 | 207 | 29.6 | 67 | ||
| Kanoya | 03h 26m | 15d 15h | sudden | +51 | 237 | 19 | 97 | ||
(*) 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 12 April 1990.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 12 April 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 12 April 1990.
*) 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 | 07h 19m | 18d 12h | sudden | +25 | 170 | 9.6 | 55 | ||
| Memambetsu | 07h 19m | 18d 05m | sudden | +36 | 173 | 12.5 | 37 | ||
| Kanoya | 07h 20m | 18d 05h | sudden | +29 | 200 | 8.5 | 66 | ||
(*) 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 17 April 1990.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 17 April 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 17 April 1990.
*) 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 | 03h 36m | 24d 24h | sudden | +13 | 131 | 13.4 | 55 | ||
| Memambetsu | 03h 36m | 24d 24m | sudden | +19 | 115 | 16.7 | 39 | ||
| Kanoya | 03h 36m | 23d 24h | sudden | +16 | 91 | 11.9 | 58 | ||
(*) 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 23 April 1990.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 23 April 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 23 April 1990.
*) 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 | 04.7h | 29d 18h | gradual | 103 | 7.8 | 41 | |||
| Kanoya | 04.7h | 30d 03h | gradual | 121 | 8.8 | 52 | |||
(*) 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 April 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 29 April 1990.
*) Plot diagram opens in a separate window.
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