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Monthly overview (Jan 1991)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6��50.4��, H: 30146nT, Z: 34971nT and F: 46171nT for January 1991.

Monthly average of the K-index daily sum is 12.2. indicates a slightly low level of geomagnetic activity during the month.

Notable geomagnetic events include 0 magnetic storms, 3 si, 2 bay, 1 sfe, 0 pi and 0 pc.

The international 5 quietest days are the 6,7,14,19,22^th.

The international 5 most disturbed days are the 12,15,24,25,31^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	09	calm				plot
2	12	moderately calm				plot
3	15	moderately calm				plot
4	12	moderately calm				plot
5	10	calm				plot
6	04	calm		��		plot
7	01	extremely calm		��		plot
8	12	moderately calm				plot
9	10	calm				plot
10	11	moderately calm				plot
11	13	moderately calm				plot
12	19	moderately disturbed	si bay		��	plot
13	14	moderately calm				plot
14	04	calm		��		plot
15	16	moderately calm			��	plot
16	12	moderately calm				plot
17	18	moderately disturbed				plot
18	14	moderately calm				plot
19	09	calm		��		plot
20	05	calm				plot
21	05	calm				plot
22	07	calm				plot
23	13	moderately calm				plot
24	27	disturbed	bay		��	plot
25	24	disturbed	sfe		��	plot
26	18	moderately disturbed				plot
27	11	moderately calm				plot
28	11	moderately calm				plot
29	09	calm				plot
30	08	calm				plot
31	25	disturbed				plot

*) Plot diagram opens in a separate window.