IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

May 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	3o	4-	4o	4o	4o	3+	5-	5-	31+	27	1.2
2	5o	5o	4o	4+	5-	4+	4o	5o	36+	38	1.4
3	5+	4o	4o	5-	3+	3+	3-	4-	31o	27	1.2
4	4o	3+	5-	2+	4-	5-	4+	4o	31o	27	1.2
5	3o	4+	4+	4+	5-	4+	4o	4o	33o	30	1.3
6	3+	2+	2o	3-	2+	3-	3+	4-	22+	13	0.8
7	2o	3-	2o	2o	2-	1o	1+	2o	15-	7	0.3
8	2o	3o	3o	1+	2+	2o	1-	4-	18o	10	0.6
9	3-	2o	2-	2-	2+	3+	5-	4+	23-	16	0.9
10	5-	3+	1+	2+	2o	1+	1o	2o	18o	12	0.7
11	2+	3o	2o	2-	3o	1+	5-	4o	22o	15	0.9
12	2o	2-	1+	1+	2o	1o	1o	2-	12o	6	0.2
13	1o	1+	1+	1+	1+	2+	4-	3+	16-	9	0.5
14	4-	2o	2+	2+	4-	4-	4-	2-	23o	15	0.8
15	3+	4-	2+	2o	2-	3o	2+	3o	21+	13	0.7
16	2o	2o	3-	2-	3-	2o	2o	4-	19-	10	0.6
17	6+	5+	3o	5-	5-	4+	3+	3+	35o	39	1.4
18	4o	3o	5-	3-	3-	4o	4o	3-	28-	21	1.1
19	3+	3o	1+	2-	2o	2+	1+	1o	16o	9	0.5
20	2o	3o	3+	3-	3o	3-	2-	3o	21+	12	0.7
21	4o	3o	3+	3-	2o	1+	2-	2o	20o	12	0.7
22	2o	2-	1+	1o	1+	2-	2+	1o	12+	6	0.3
23	2-	1+	2o	2+	2+	3+	1-	2-	15+	8	0.4
24	1+	1o	1o	1o	1o	1-	1-	1o	8-	4	0.1
25	2-	2-	2o	1o	2o	1+	2-	1o	12+	6	0.3
26	1o	1o	2o	1o	3o	1+	2o	3-	14o	7	0.4
27	2o	2o	1o	2+	3o	3o	4o	4+	22-	14	0.8
28	4-	4+	3-	3o	2-	3+	3+	3o	25o	17	0.9
29	6+	5o	5o	5+	6-	5+	6-	5+	44-	62	1.7
30	4+	4+	4o	3+	4o	5-	4+	4-	33-	29	1.3
31	3+	3o	3-	2+	4o	2o	3o	4-	24o	16	0.9
									Mean	17	0.80

Preliminary sudden commencements: none