The monthly mean values of the geomagnetic field components at Kakioka are D: -7°-3.6′°, H: 29987nT, Z: 35384nT and F: 46381nT for April 2001.
Monthly average of the K-index daily sum is 18.6. indicates an extremely high level of geomagnetic activity during the month.
Notable geomagnetic events include 6 magnetic storms, 13 si, 1 bay, 4 sfe, 2 pi and 1 pc.
The international 5 quietest days are the 19,24,25,27,30th.
The international 5 most disturbed days are the 8,11,12,13,18th.
Plot of the geomagnetic hourly value for April 2001
Plot of the K-index daily total sum for 2001
Details of the geomagnetic storms in April 2001
| Date | K-index daily sum |
Geomagnetic activity |
Geomagnetic phenomena |
International 5 quietest days |
International 5 quietest days |
geomagnetic 1-minute value plot |
|---|---|---|---|---|---|---|
| 1 | 26 | disturbed | plot | |||
| 2 | 21 | moderately disturbed | sfe | plot | ||
| 3 | 15 | moderately calm | plot | |||
| 4 | 22 | moderately disturbed | si | plot | ||
| 5 | 25 | disturbed | plot | |||
| 6 | 20 | moderately disturbed | plot | |||
| 7 | 23 | disturbed | si | plot | ||
| 8 | 33 | disturbed | storm si pi pc | ○ | plot | |
| 9 | 23 | disturbed | bay | plot | ||
| 10 | 17 | moderately disturbed | sfe | plot | ||
| 11 | 29 | disturbed | storm si sfe | ○ | plot | |
| 12 | 25 | disturbed | ○ | plot | ||
| 13 | 29 | disturbed | storm si | ○ | plot | |
| 14 | 22 | moderately disturbed | plot | |||
| 15 | 17 | moderately disturbed | plot | |||
| 16 | 14 | moderately calm | plot | |||
| 17 | 09 | calm | plot | |||
| 18 | 25 | disturbed | storm si | ○ | plot | |
| 19 | 05 | calm | ○ | plot | ||
| 20 | 07 | calm | plot | |||
| 21 | 11 | moderately calm | storm si | plot | ||
| 22 | 28 | disturbed | si | plot | ||
| 23 | 19 | moderately disturbed | plot | |||
| 24 | 14 | moderately calm | ○ | plot | ||
| 25 | 12 | moderately calm | sfe | ○ | plot | |
| 26 | 12 | moderately calm | plot | |||
| 27 | 10 | calm | ○ | plot | ||
| 28 | 28 | disturbed | storm si pi | plot | ||
| 29 | 17 | moderately disturbed | plot | |||
| 30 | 01 | extremely calm | ○ | plot |
*) Plot diagram opens in a separate window.
