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Monthly overview (Oct 1991)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6��52.7��, H: 30100nT, Z: 35019nT and F: 46177nT for October 1991.

Monthly average of the K-index daily sum is 23.5. indicates an extremely high level of geomagnetic activity during the month.

Notable geomagnetic events include 5 magnetic storms, 4 si, 6 bay, 3 sfe, 0 pi and 0 pc.

The international 5 quietest days are the 12,13,15,16,17^th.

The international 5 most disturbed days are the 1,2,28,29,31^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	31	disturbed	storm		��	plot
2	34	disturbed	bay		��	plot
3	19	moderately disturbed				plot
4	26	disturbed				plot
5	19	moderately disturbed				plot
6	25	disturbed	storm			plot
7	26	disturbed	si			plot
8	29	disturbed				plot
9	15	moderately calm				plot
10	24	disturbed				plot
11	17	moderately disturbed				plot
12	10	calm		��		plot
13	11	moderately calm		��		plot
14	10	calm				plot
15	10	calm		��		plot
16	08	calm		��		plot
17	14	moderately calm	si			plot
18	21	moderately disturbed	si			plot
19	20	moderately disturbed	storm			plot
20	27	disturbed				plot
21	31	disturbed	bay			plot
22	24	disturbed				plot
23	23	disturbed				plot
24	26	disturbed	sfe			plot
25	27	disturbed	bay			plot
26	27	disturbed				plot
27	33	disturbed	bay sfe			plot
28	43	disturbed	storm si		��	plot
29	42	disturbed			��	plot
30	24	disturbed	sfe			plot
31	34	disturbed	storm			plot

*) Plot diagram opens in a separate window.