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Monthly overview (Apr 1997)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7��0.8��, H: 30069nT, Z: 35295nT and F: 46367nT for April 1997.

Monthly average of the K-index daily sum is 13.6. indicates a moderate level of geomagnetic activity during the month.

Notable geomagnetic events include 1 magnetic storms, 0 si, 3 bay, 0 sfe, 8 pi and 0 pc.

The international 5 quietest days are the 15,26,27,28,29^th.

The international 5 most disturbed days are the 11,17,18,21,22^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	19	moderately disturbed	pi			plot
2	14	moderately calm	pi			plot
3	08	calm				plot
4	16	moderately calm				plot
5	11	moderately calm				plot
6	15	moderately calm				plot
7	09	calm	pi			plot
8	07	calm				plot
9	08	calm				plot
10	14	moderately calm	storm			plot
11	31	disturbed	pi		��	plot
12	14	moderately calm	pi			plot
13	12	moderately calm				plot
14	07	calm				plot
15	04	calm		��		plot
16	16	moderately calm	bay			plot
17	23	disturbed	pi		��	plot
18	24	disturbed	pi		��	plot
19	18	moderately disturbed	bay			plot
20	03	extremely calm				plot
21	23	disturbed	bay		��	plot
22	18	moderately disturbed				plot
23	19	moderately disturbed				plot
24	18	moderately disturbed				plot
25	14	moderately calm				plot
26	08	calm		��		plot
27	05	calm		��		plot
28	05	calm		��		plot
29	09	calm				plot
30	15	moderately calm				plot

*) Plot diagram opens in a separate window.