| 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) |
|||
| Memambetsu | 03h 59m | 14d 19m | sudden | +22 | 164 | 15.5 | 37 | 12 | 39 |
| Kanoya | 03h 59m | 14d 19h | sudden | +23 | 164 | 11.8 | 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 Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 12 September 1999.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 12 September 1999.
*) 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 | 12h 22m | 23d 10h | sudden | +29 | 206 | 18.3 | 83 | 361 | 66 |
| Memambetsu | 12h 22m | 23d 10m | sudden | +37 | 215 | 25.6 | 62 | 47 | 173 |
| Kanoya | 12h 22m | 23d 10h | sudden | +33 | 241 | 16.1 | 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 22 September 1999.
Plot of Memambetsu 1-minute geomagnetic field for the geomagnetic storm on 22 September 1999.
Plot of Kanoya 1-minute geomagnetic field for during the geomagnetic storm on 22 September 1999.
*) Plot diagram opens in a separate window.
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