| 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 40m | 18d 24h | sudden | +25 | 116 | 10.7 | 33 | ||
| Memambetsu | 07h 39m | 18d 24m | sudden | +39 | 126 | 12.5 | 26 | ||
| Kanoya | 07h 39m | 18d 24h | sudden | +27 | 134 | 10.1 | 37 | ||
(*) 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 18 May 1990.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 18 May 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 18 May 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 | 10h 22m | 22d 24h | sudden | +18 | 120 | 14.7 | 63 | ||
| Memambetsu | 10h 21m | 22d 23m | sudden | +24 | 120 | 18.4 | 43 | ||
| Kanoya | 10h 21m | 22d 24h | sudden | +19 | 142 | 14.5 | 70 | ||
(*) 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 21 May 1990.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 21 May 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 21 May 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 | 20h 37m | 27d 24h | sudden | +25 | 138 | 17.8 | 83 | ||
| Memambetsu | 20h 37m | 27d 22m | sudden | +24 | 144 | 23.1 | 48 | ||
| Kanoya | 20h 37m | 27d 21h | sudden | +35 | 157 | 13.9 | 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 26 May 1990.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 26 May 1990.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 26 May 1990.
*) Plot diagram opens in a separate window.
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