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Monthly overview (Jun 1991)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6��52.4��, H: 30109nT, Z: 35001nT and F: 46170nT for June 1991.

Monthly average of the K-index daily sum is 25.6. indicates an extremely high level of geomagnetic activity during the month.

Notable geomagnetic events include 5 magnetic storms, 9 si, 0 bay, 4 sfe, 0 pi and 0 pc.

The international 5 quietest days are the 14,16,27,28,29^th.

The international 5 most disturbed days are the 1,5,10,11,13^th.

Date	K-index daily sum	Geomagnetic activity	Geomagnetic phenomena	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	34	disturbed			��	plot
2	30	disturbed				plot
3	17	moderately disturbed				plot
4	30	disturbed	storm sfe			plot
5	50	disturbed	si		��	plot
6	29	disturbed	sfe			plot
7	24	disturbed	si			plot
8	21	moderately disturbed				plot
9	35	disturbed	storm si			plot
10	42	disturbed	storm		��	plot
11	37	disturbed	si		��	plot
12	35	disturbed	storm sfe			plot
13	47	disturbed	si			plot
14	19	moderately disturbed		��		plot
15	19	moderately disturbed	sfe			plot
16	10	calm		��		plot
17	31	disturbed	storm si			plot
18	23	disturbed				plot
19	24	disturbed				plot
20	20	moderately disturbed				plot
21	23	disturbed				plot
22	20	moderately disturbed				plot
23	28	disturbed				plot
24	23	disturbed				plot
25	23	disturbed				plot
26	20	moderately disturbed				plot
27	12	moderately calm		��		plot
28	11	moderately calm		��		plot
29	07	calm				plot
30	25	disturbed	si			plot

*) Plot diagram opens in a separate window.