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Monthly overview (Sep 1999)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7��3.8��, H: 30007nT, Z: 35372nT and F: 46385nT for September 1999.

Monthly average of the K-index daily sum is 19.1. indicates an extremely high level of geomagnetic activity during the month.

Notable geomagnetic events include 1 magnetic storms, 2 si, 0 bay, 1 sfe, 5 pi and 0 pc.

The international 5 quietest days are the 5,6,8,24,25^th.

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

*) Plot diagram opens in a separate window.