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Monthly overview (Fab 1990)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6��49.8��, H: 30128nT, Z: 34939nT and F: 46135nT for February 1990.

Monthly average of the K-index daily sum is 21.4. indicates an extremely high level of geomagnetic activity during the month.

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

The international 5 quietest days are the 8,9,10,12,13^th.

The international 5 most disturbed days are the 16,17,19,20,23^th.

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

*) Plot diagram opens in a separate window.