Home > Observation data > Monthly overview > Monthly overview (Dec 1991)

Monthly overview (Dec 1991)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6��52.2��, H: 30121nT, Z: 35025nT and F: 46196nT for December 1991.

Monthly average of the K-index daily sum is 17.9. indicates a high level of geomagnetic activity during the month.

Notable geomagnetic events include 0 magnetic storms, 5 si, 3 bay, 1 sfe, 0 pi and 0 pc.

The international 5 quietest days are the 6,7,15,22,25^th.

The international 5 most disturbed days are the 17,21,27,28,29^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	15	moderately calm	sfe			plot
2	24	disturbed				plot
3	18	moderately disturbed				plot
4	16	moderately calm				plot
5	13	moderately calm				plot
6	09	calm		��		plot
7	09	calm		��		plot
8	16	moderately calm				plot
9	18	moderately disturbed				plot
10	20	moderately disturbed				plot
11	17	moderately disturbed				plot
12	18	moderately disturbed				plot
13	20	moderately disturbed	bay			plot
14	21	moderately disturbed				plot
15	06	calm		��		plot
16	22	moderately disturbed				plot
17	26	disturbed			��	plot
18	19	moderately disturbed				plot
19	20	moderately disturbed				plot
20	13	moderately calm				plot
21	22	moderately disturbed			��	plot
22	09	calm		��		plot
23	22	moderately disturbed	si			plot
24	15	moderately calm				plot
25	10	calm				plot
26	15	moderately calm	si			plot
27	31	disturbed	si bay		��	plot
28	23	disturbed	bay		��	plot
29	29	disturbed	si			plot
30	21	moderately disturbed				plot
31	19	moderately disturbed	si			plot

*) Plot diagram opens in a separate window.