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Monthly overview (Jul 1991)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6��52.3��, H: 30118nT, Z: 35003nT and F: 46177nT for July 1991.

Monthly average of the K-index daily sum is 20.1. indicates an extremely high level of geomagnetic activity during the month.

Notable geomagnetic events include 2 magnetic storms, 6 si, 1 bay, 2 sfe, 0 pi and 0 pc.

The international 5 quietest days are the 5,26,28,29,31^th.

The international 5 most disturbed days are the 8,9,13,14,17^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	19	moderately disturbed				plot
2	22	moderately disturbed	si			plot
3	24	disturbed				plot
4	17	moderately disturbed				plot
5	07	calm		��		plot
6	15	moderately calm	si			plot
7	14	moderately calm				plot
8	31	disturbed	storm		��	plot
9	39	disturbed			��	plot
10	17	moderately disturbed				plot
11	23	disturbed				plot
12	25	disturbed	si			plot
13	44	disturbed	storm		��	plot
14	34	disturbed	bay		��	plot
15	14	moderately calm				plot
16	17	moderately disturbed				plot
17	25	disturbed				plot
18	18	moderately disturbed				plot
19	26	disturbed	si			plot
20	25	disturbed				plot
21	25	disturbed				plot
22	21	moderately disturbed				plot
23	20	moderately disturbed	si			plot
24	14	moderately calm				plot
25	18	moderately disturbed				plot
26	06	calm		��		plot
27	11	moderately calm				plot
28	12	moderately calm		��		plot
29	13	moderately calm		��		plot
30	15	moderately calm	si sfe			plot
31	12	moderately calm	sfe			plot

*) Plot diagram opens in a separate window.