The monthly mean values of the geomagnetic field components at Kakioka are D: -7°-3.7′°, H: 29999nT, Z: 35375nT and F: 46383nT for October 1999.
Monthly average of the K-index daily sum is 19.4. indicates an extremely high level of geomagnetic activity during the month.
Notable geomagnetic events include 1 magnetic storms, 2 si, 3 bay, 0 sfe, 9 pi and 0 pc.
The international 5 quietest days are the 6,7,19,20,30th.
The international 5 most disturbed days are the 10,12,14,22,23th.
Plot of the geomagnetic hourly value for October 1999
Plot of the K-index daily total sum for 1999
Details of the geomagnetic storms in October 1999
| Date | K-index daily sum |
Geomagnetic activity |
Geomagnetic phenomena |
International 5 quietest days |
International 5 quietest days |
geomagnetic 1-minute value plot |
|---|---|---|---|---|---|---|
| 1 | 16 | moderately calm | plot | |||
| 2 | 17 | moderately disturbed | plot | |||
| 3 | 13 | moderately calm | plot | |||
| 4 | 21 | moderately disturbed | plot | |||
| 5 | 23 | disturbed | plot | |||
| 6 | 13 | moderately calm | ○ | plot | ||
| 7 | 08 | calm | ○ | plot | ||
| 8 | 12 | moderately calm | plot | |||
| 9 | 13 | moderately calm | plot | |||
| 10 | 29 | disturbed | ○ | plot | ||
| 11 | 25 | disturbed | plot | |||
| 12 | 32 | disturbed | ○ | plot | ||
| 13 | 26 | disturbed | plot | |||
| 14 | 26 | disturbed | ○ | plot | ||
| 15 | 28 | disturbed | plot | |||
| 16 | 23 | disturbed | plot | |||
| 17 | 18 | moderately disturbed | plot | |||
| 18 | 11 | moderately calm | plot | |||
| 19 | 07 | calm | ○ | plot | ||
| 20 | 07 | calm | ○ | plot | ||
| 21 | 23 | disturbed | plot | |||
| 22 | 40 | disturbed | ○ | plot | ||
| 23 | 27 | disturbed | ○ | plot | ||
| 24 | 25 | disturbed | plot | |||
| 25 | 19 | moderately disturbed | plot | |||
| 26 | 15 | moderately calm | plot | |||
| 27 | 20 | moderately disturbed | plot | |||
| 28 | 18 | moderately disturbed | plot | |||
| 29 | 16 | moderately calm | plot | |||
| 30 | 11 | moderately calm | ○ | plot | ||
| 31 | 18 | moderately disturbed | plot |
*) Plot diagram opens in a separate window.
