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Monthly overview (Sep 1998)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7°-2.9′°, H: 30029nT, Z: 35348nT and F: 46381nT for September 1998.

Monthly average of the K-index daily sum is 14.6. indicates a moderate level of geomagnetic activity during the month.

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

The international 5 quietest days are the 4,14,16,20,28^th.

The international 5 most disturbed days are the 1,18,24,25,26^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	24	disturbed	pi		○	plot
2	16	moderately calm				plot
3	12	moderately calm				plot
4	13	moderately calm		○		plot
5	13	moderately calm	pi			plot
6	09	calm				plot
7	10	calm				plot
8	11	moderately calm				plot
9	13	moderately calm	sfe			plot
10	10	calm				plot
11	10	calm				plot
12	19	moderately disturbed				plot
13	10	calm				plot
14	03	extremely calm		○		plot
15	11	moderately calm				plot
16	07	calm		○		plot
17	10	calm				plot
18	26	disturbed	storm		○	plot
19	15	moderately calm	pi			plot
20	08	calm		○		plot
21	14	moderately calm	pi			plot
22	13	moderately calm				plot
23	16	moderately calm				plot
24	23	disturbed	storm si		○	plot
25	41	disturbed			○	plot
26	23	disturbed			○	plot
27	17	moderately disturbed				plot
28	11	moderately calm		○		plot
29	13	moderately calm				plot
30	16	moderately calm				plot

*) Plot diagram opens in a separate window.