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Monthly overview (Apr 1999)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7°-2.9′°, H: 30031nT, Z: 35359nT and F: 46391nT for April 1999.

Monthly average of the K-index daily sum is 16.9. indicates a slightly high level of geomagnetic activity during the month.

Notable geomagnetic events include 0 magnetic storms, 0 si, 2 bay, 1 sfe, 4 pi and 0 pc.

The international 5 quietest days are the 13,15,22,23,25^th.

The international 5 most disturbed days are the 17,20,28,29,30^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	15	moderately calm				plot
2	17	moderately disturbed				plot
3	15	moderately calm				plot
4	20	moderately disturbed	sfe			plot
5	16	moderately calm				plot
6	15	moderately calm				plot
7	14	moderately calm				plot
8	14	moderately calm	bay pi			plot
9	12	moderately calm				plot
10	24	disturbed	pi			plot
11	18	moderately disturbed				plot
12	14	moderately calm				plot
13	06	calm		○		plot
14	12	moderately calm				plot
15	04	calm		○		plot
16	22	moderately disturbed				plot
17	28	disturbed			○	plot
18	15	moderately calm				plot
19	18	moderately disturbed				plot
20	29	disturbed	pi		○	plot
21	22	moderately disturbed				plot
22	14	moderately calm		○		plot
23	13	moderately calm		○		plot
24	13	moderately calm				plot
25	10	calm		○		plot
26	14	moderately calm				plot
27	21	moderately disturbed				plot
28	22	moderately disturbed	bay		○	plot
29	24	disturbed			○	plot
30	25	disturbed	pi		○	plot

*) Plot diagram opens in a separate window.