The monthly mean values of the geomagnetic field components at Kakioka are D: -7°-13.6′°, H: 29950nT, Z: 35550nT and F: 46485nT for September 2011.
Monthly average of the K-index daily sum is 12.1. indicates a slightly low level of geomagnetic activity during the month.
Notable geomagnetic events include 3 magnetic storms, 6 si, 1 bay, 5 sfe, 8 pi and 0 pc.
The international 5 quietest days are the 1,8,16,19,23th.
The international 5 most disturbed days are the 10,12,17,26,27th.
Plot of the geomagnetic hourly value for September 2011
Plot of the K-index daily total sum for 2011
Details of the geomagnetic storms in September 2011
| Date | K-index daily sum |
Geomagnetic activity |
Geomagnetic phenomena |
International 5 quietest days |
International 5 quietest days |
geomagnetic 1-minute value plot |
|---|---|---|---|---|---|---|
| 1 | 00 | extremely calm | ○ | plot | ||
| 2 | 05 | calm | plot | |||
| 3 | 18 | moderately disturbed | pi | plot | ||
| 4 | 11 | moderately calm | plot | |||
| 5 | 09 | calm | plot | |||
| 6 | 12 | moderately calm | sfe | plot | ||
| 7 | 08 | calm | sfe | plot | ||
| 8 | 00 | extremely calm | ○ | plot | ||
| 9 | 21 | moderately disturbed | storm si bay | plot | ||
| 10 | 28 | disturbed | ○ | plot | ||
| 11 | 14 | moderately calm | plot | |||
| 12 | 24 | disturbed | pi | ○ | plot | |
| 13 | 18 | moderately disturbed | plot | |||
| 14 | 08 | calm | pi | plot | ||
| 15 | 07 | calm | plot | |||
| 16 | 01 | extremely calm | pi | ○ | plot | |
| 17 | 31 | disturbed | storm si | ○ | plot | |
| 18 | 10 | calm | plot | |||
| 19 | 01 | extremely calm | ○ | plot | ||
| 20 | 09 | calm | plot | |||
| 21 | 09 | calm | plot | |||
| 22 | 03 | extremely calm | plot | |||
| 23 | 02 | extremely calm | ○ | plot | ||
| 24 | 02 | extremely calm | plot | |||
| 25 | 12 | moderately calm | si sfe pi | plot | ||
| 26 | 24 | disturbed | storm si sfe | ○ | plot | |
| 27 | 24 | disturbed | ○ | plot | ||
| 28 | 19 | moderately disturbed | pi | plot | ||
| 29 | 24 | disturbed | pi | plot | ||
| 30 | 08 | calm | plot |
*) Plot diagram opens in a separate window.
