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Monthly overview (May 1999)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7��2.7��, H: 30039nT, Z: 35360nT and F: 46397nT for May 1999.

Monthly average of the K-index daily sum is 13. indicates a moderate level of geomagnetic activity during the month.

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

The international 5 quietest days are the 11,16,17,22,31^th.

The international 5 most disturbed days are the 1,2,13,18,25^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	pi		��	plot
2	19	moderately disturbed			��	plot
3	17	moderately disturbed				plot
4	08	calm				plot
5	13	moderately calm	si			plot
6	16	moderately calm				plot
7	13	moderately calm				plot
8	08	calm				plot
9	11	moderately calm				plot
10	08	calm	sfe			plot
11	01	extremely calm		��		plot
12	15	moderately calm				plot
13	28	disturbed			��	plot
14	15	moderately calm				plot
15	11	moderately calm	pi			plot
16	09	calm		��		plot
17	06	calm	sfe	��		plot
18	28	disturbed			��	plot
19	15	moderately calm				plot
20	13	moderately calm				plot
21	08	calm				plot
22	06	calm		��		plot
23	15	moderately calm				plot
24	23	disturbed				plot
25	22	moderately disturbed				plot
26	12	moderately calm				plot
27	12	moderately calm				plot
28	11	moderately calm				plot
29	10	calm				plot
30	09	calm				plot
31	01	extremely calm				plot

*) Plot diagram opens in a separate window.