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Monthly overview (Aug 1991)

The monthly mean values of the geomagnetic field components at Kakioka are D: -6°-52.8′°, H: 30106nT, Z: 35010nT and F: 46175nT for August 1991.

Monthly average of the K-index daily sum is 22.9. indicates an extremely high level of geomagnetic activity during the month.

Notable geomagnetic events include 6 magnetic storms, 8 si, 5 bay, 4 sfe, 0 pi and 0 pc.

The international 5 quietest days are the 10,13,24,25,26^th.

The international 5 most disturbed days are the 2,12,19,20,31^th.

Date	K-index daily sum	Geomagnetic activity	International 5 quietest days	International 5 quietest days	geomagnetic 1-minute value plot
1	25	disturbed			plot
2	33	disturbed		○	plot
3	26	disturbed			plot
4	28	disturbed			plot
5	24	disturbed			plot
6	24	disturbed			plot
7	19	moderately disturbed			plot
8	14	moderately calm			plot
9	23	disturbed			plot
10	14	moderately calm	○		plot
11	28	disturbed			plot
12	29	disturbed		○	plot
13	13	moderately calm	○		plot
14	20	moderately disturbed			plot
15	28	disturbed			plot
16	23	disturbed			plot
17	23	disturbed			plot
18	20	moderately disturbed			plot
19	35	disturbed		○	plot
20	36	disturbed		○	plot
21	30	disturbed			plot
22	25	disturbed			plot
23	14	moderately calm			plot
24	17	moderately disturbed	○		plot
25	15	moderately calm	○		plot
26	12	moderately calm	○		plot
27	22	moderately disturbed			plot
28	16	moderately calm			plot
29	16	moderately calm			plot
30	29	disturbed			plot
31	28	disturbed		○	plot

*) Plot diagram opens in a separate window.