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Monthly overview (Aug 1990)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6��50.8��, H: 30126nT, Z: 34959nT and F: 46149nT for August 1990.

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 3 magnetic storms, 2 si, 3 bay, 0 sfe, 0 pi and 0 pc.

The international 5 quietest days are the 5,8,9,10,28^th.

The international 5 most disturbed days are the 21,22,23,26,30^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	25	disturbed	storm			plot
2	12	moderately calm				plot
3	16	moderately calm	bay			plot
4	09	calm				plot
5	10	calm		��		plot
6	16	moderately calm				plot
7	13	moderately calm				plot
8	08	calm		��		plot
9	10	calm		��		plot
10	11	moderately calm		��		plot
11	16	moderately calm				plot
12	12	moderately calm				plot
13	21	moderately disturbed				plot
14	23	disturbed				plot
15	24	disturbed				plot
16	24	disturbed				plot
17	19	moderately disturbed				plot
18	16	moderately calm				plot
19	18	moderately disturbed				plot
20	19	moderately disturbed				plot
21	28	disturbed	storm si		��	plot
22	30	disturbed	bay		��	plot
23	34	disturbed	bay		��	plot
24	19	moderately disturbed				plot
25	11	moderately calm				plot
26	35	disturbed	storm		��	plot
27	22	moderately disturbed				plot
28	14	moderately calm				plot
29	17	moderately disturbed	si			plot
30	27	disturbed				plot
31	18	moderately disturbed				plot

*) Plot diagram opens in a separate window.