IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

October 2025

International quiet and disturbed days

Geomagnetic Planetary Indices

Kp three-hourly									daily
	1	2	3	4	5	6	7	8	Sum	Ap	Cp
1	5o	5o	5-	4o	5o	5-	6+	4+	39o	47	1.5
2	5+	7-	4+	5-	4o	3-	5o	4+	37o	45	1.5
3	4+	5o	5-	4o	3+	4-	4-	3-	31+	28	1.2
4	3o	3+	4-	4-	4o	4-	3o	2+	27-	19	1.0
5	2+	3+	3o	1+	2o	1o	0+	1o	14+	8	0.4
6	0+	0o	1-	1-	1+	2-	2-	2o	8+	4	0.1
7	2o	2+	2+	3-	4o	3+	3-	2o	21+	13	0.7
8	3-	4-	2+	2-	2+	2+	1+	0+	17-	9	0.5
9	0+	0+	2o	1-	1o	1-	1+	2o	8+	4	0.1
10	3+	2o	3-	2o	1+	1o	1+	2-	15+	8	0.4
11	2o	4-	4+	3o	2o	2+	3-	4-	24-	16	0.9
12	4o	4o	4o	4o	4o	5-	5o	4+	34o	32	1.3
13	5-	4+	3+	4-	3o	3-	3+	3-	28-	21	1.1
14	2+	2o	2o	1+	2o	2o	1o	2+	15o	7	0.3
15	4-	3+	3o	2+	2-	1o	1-	2-	17+	10	0.6
16	0+	0+	1+	1o	1-	0+	1+	1+	7-	4	0.1
17	1+	2-	3-	4-	2+	3o	2-	1+	18-	10	0.6
18	4-	4+	5-	4o	3+	5-	6+	4+	35+	38	1.4
19	5o	3o	2o	3+	3o	3+	2+	3-	25-	18	1.0
20	3-	3-	2+	1+	2-	1o	1+	2-	15-	7	0.4
21	3-	3o	2-	0+	1o	1+	3-	2+	15o	8	0.4
22	0+	1-	1-	1-	1o	1o	1+	1+	7o	4	0.1
23	2-	1o	0o	1+	1+	1o	2o	2+	11-	5	0.2
24	3-	2+	2o	2+	2o	2+	3o	1+	18o	9	0.5
25	2+	4-	3o	2o	2o	1-	0+	0+	14+	8	0.5
26	1-	1-	1+	1+	0o	1-	0o	1-	5+	3	0.0
27	1-	1-	1-	1-	1-	2-	2o	3o	10o	5	0.2
28	3o	3+	3+	2o	3+	3o	4o	4o	26o	18	1.0
29	2+	3-	3+	3o	3o	4-	4o	4+	26+	19	1.0
30	4+	4-	4o	5+	5+	4+	4-	5o	36-	37	1.4
31	4+	5-	4+	3+	4-	3o	3-	3-	29-	23	1.1
									Mean	16	0.69

Preliminary sudden commencements: none