| 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 | 05h 33m | 06d 19h | sudden | +9 | 134 | -1 | 81 | ||
| Memambetsu | 05h 33m | 06d 19m | sudden | +18 | 127 | -1 | 37 | ||
| Kanoya | 05h 33m | 06d 19h | sudden | +11 | 166 | -1 | 93 | ||
(*) 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 2 August 1991.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 2 August 1991.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 2 August 1991.
*) 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 | 02h 53m | 13d 14h | sudden | +35 | 164 | -1 | 50 | ||
| Memambetsu | 02h 53m | 13d 14m | sudden | +38 | 163 | -1 | 32 | ||
| Kanoya | 02h 54m | 13d 14h | sudden | +41 | 196 | -1 | 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 11 August 1991.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 11 August 1991.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 11 August 1991.
*) 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 | 18h 34m | C | sudden | +31 | 223 | -1 | 108 | ||
| Memambetsu | 18h 33m | C | sudden | +39 | 235 | -1 | 67 | ||
| Kanoya | 18h 33m | C | sudden | +38 | 249 | -1 | 119 | ||
(*) 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 August 1991.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 18 August 1991.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 18 August 1991.
*) 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 59m | 22d 19h | sudden | +63 | 217 | -1 | 93 | ||
| Memambetsu | 08h 00m | 22d 19m | sudden | +89 | 238 | -1 | 54 | ||
| Kanoya | 08h 00m | 22d 18h | sudden | +69 | 255 | -1 | 113 | ||
(*) 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 20 August 1991.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 20 August 1991.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 20 August 1991.
*) 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 | 15h 15m | 28d 06h | sudden | +42 | 115 | -1 | 68 | ||
| Memambetsu | 15h 15m | 28d 08m | sudden | +58 | 142 | -1 | 24 | ||
| Kanoya | 15h 15m | 28d 09h | sudden | +46 | 106 | -1 | 74 | ||
(*) 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 27 August 1991.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 27 August 1991.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 27 August 1991.
*) 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 | 04.2h m | 02d 18h | gradual | 121 | -1 | 60 | |||
| Memambetsu | 04.2h m | 02d 18m | gradual | 160 | -1 | 34 | |||
| Kanoya | 04.3h m | 02d 21h | gradual | 129 | -1 | 72 | |||
(*) 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 30 August 1991.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 30 August 1991.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 30 August 1991.
*) Plot diagram opens in a separate window.
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