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Monthly overview (Apr 2001)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7��3.6��, H: 29987nT, Z: 35384nT and F: 46381nT for April 2001.

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 6 magnetic storms, 7 si, 1 bay, 4 sfe, 2 pi and 1 pc.

The international 5 quietest days are the 19,24,25,27,30^th.

The international 5 most disturbed days are the 8,11,12,13,18^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	26	disturbed				plot
2	21	moderately disturbed	sfe			plot
3	15	moderately calm				plot
4	22	moderately disturbed	si			plot
5	25	disturbed				plot
6	20	moderately disturbed				plot
7	23	disturbed	si			plot
8	33	disturbed	storm pi pc		��	plot
9	23	disturbed	bay			plot
10	17	moderately disturbed	sfe			plot
11	29	disturbed	storm si sfe		��	plot
12	25	disturbed			��	plot
13	29	disturbed	storm si		��	plot
14	22	moderately disturbed				plot
15	17	moderately disturbed				plot
16	14	moderately calm				plot
17	09	calm				plot
18	25	disturbed	storm			plot
19	05	calm		��		plot
20	07	calm				plot
21	11	moderately calm	storm			plot
22	28	disturbed	si			plot
23	19	moderately disturbed				plot
24	14	moderately calm		��		plot
25	12	moderately calm	sfe	��		plot
26	12	moderately calm				plot
27	10	calm		��		plot
28	28	disturbed	storm pi			plot
29	17	moderately disturbed				plot
30	01	extremely calm				plot

*) Plot diagram opens in a separate window.