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Monthly overview (Dec 1999)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7��3��, H: 30020nT, Z: 35374nT and F: 46395nT for December 1999.

Monthly average of the K-index daily sum is 14.1. indicates a moderate level of geomagnetic activity during the month.

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

The international 5 quietest days are the 14,21,22,23,26^th.

The international 5 most disturbed days are the 4,5,6,13,31^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	12	moderately calm				plot
2	12	moderately calm				plot
3	23	disturbed	bay			plot
4	27	disturbed	pi		��	plot
5	24	disturbed	pi		��	plot
6	24	disturbed			��	plot
7	20	moderately disturbed				plot
8	20	moderately disturbed				plot
9	17	moderately disturbed				plot
10	16	moderately calm				plot
11	11	moderately calm				plot
12	16	moderately calm	storm			plot
13	28	disturbed			��	plot
14	10	calm		��		plot
15	05	calm				plot
16	11	moderately calm				plot
17	09	calm				plot
18	10	calm				plot
19	08	calm				plot
20	05	calm				plot
21	01	extremely calm		��		plot
22	01	extremely calm		��		plot
23	06	calm		��		plot
24	18	moderately disturbed				plot
25	19	moderately disturbed				plot
26	04	calm				plot
27	14	moderately calm				plot
28	10	calm	sfe			plot
29	10	calm				plot
30	17	moderately disturbed				plot
31	29	disturbed				plot

*) Plot diagram opens in a separate window.