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Monthly overview (Oct 2025)

The monthly mean values of the geomagnetic field components at Kakioka are D: -7°-59.1′°, H: 30116nT, Z: 36006nT and F: 46940nT for October 2025.

Monthly average of the K-index daily sum is 18.4. indicates a high level of geomagnetic activity during the month.

Notable geomagnetic events include 2 magnetic storms, 1 si, 11 bay, 0 sfe, 8 pi and 2 pc.

The international 5 quietest days are the 6,9,16,22,26^th.

The international 5 most disturbed days are the 1,2,12,18,30^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	bay pi pc		○	plot
2	31	disturbed			○	plot
3	27	disturbed				plot
4	23	disturbed				plot
5	14	moderately calm				plot
6	8	calm		○		plot
7	19	moderately disturbed	bay			plot
8	17	moderately disturbed	bay			plot
9	12	moderately calm	si	○		plot
10	16	moderately calm				plot
11	24	disturbed				plot
12	28	disturbed	pi		○	plot
13	25	disturbed	bay pc			plot
14	12	moderately calm	pi			plot
15	15	moderately calm				plot
16	9	calm		○		plot
17	18	moderately disturbed				plot
18	32	disturbed	storm bay pi		○	plot
19	21	moderately disturbed				plot
20	13	moderately calm				plot
21	13	moderately calm				plot
22	9	calm		○		plot
23	7	calm				plot
24	16	moderately calm	bay			plot
25	10	calm				plot
26	7	calm		○		plot
27	12	moderately calm				plot
28	23	disturbed	bay pi			plot
29	23	disturbed	bay			plot
30	31	disturbed	storm		○	plot
31	25	disturbed				plot

*) Plot diagram opens in a separate window.