IUGG: Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

May 2026

International quiet and disturbed days

Geomagnetic Planetary Indices

Kp three-hourly									daily
	1	2	3	4	5	6	7	8	Sum	Ap	Cp
1	4-	4+	3-	1+	0+	2o	3+	1+	19o	13	0.7
2	2+	1+	1-	2-	1+	2-	2-	3-	13+	6	0.3
3	3o	2+	2o	1o	2-	3-	1o	1-	14+	8	0.4
4	2-	2o	2-	3-	3-	4+	6o	4o	25o	23	1.1
5	5-	4-	2-	1o	1-	1o	1+	1-	15-	11	0.6
6	0+	0o	0+	0+	0+	1-	1-	1-	3+	2	0.0
7	0+	0+	0+	0+	1-	3+	4-	2o	11o	7	0.4
8	3-	1o	2o	3+	3+	3+	2+	3-	21-	12	0.7
9	2o	1+	1-	1+	1-	1+	1-	1-	9-	4	0.1
10	0o	1-	1-	1-	1o	1+	2o	1-	7o	4	0.1
11	2o	1+	1-	1-	2-	1+	1+	0+	9+	4	0.2
12	0+	1-	1-	0+	1o	1o	1o	1-	6-	3	0.1
13	0+	1+	1o	1+	3o	3o	3o	3o	16o	10	0.5
14	3-	2-	1+	1-	1-	1o	1-	1-	9+	5	0.2
15	2o	2-	3-	4-	5o	5+	4+	6o	31-	33	1.3
16	6-	5-	4+	4o	3-	5-	4-	3+	33o	32	1.3
17	2-	2o	2-	2+	2+	2-	2o	2-	15+	7	0.4
18	2+	2-	2o	2-	3-	2+	2o	3-	17+	8	0.5
19	2-	3-	3+	3+	4o	4-	3-	3-	24o	16	0.9
20	3o	3-	1+	1-	1+	1o	1+	2o	13+	7	0.4
21	3-	2o	1o	1+	2o	1o	2o	1+	13+	6	0.3
22	1o	1o	1+	1+	0+	1o	1-	2+	9o	4	0.2
23	0+	0+	1o	0+	0+	0o	0o	0o	2+	2	0.0
24	0+	1-	1-	1o	2-	1+	2+	2-	10-	5	0.2
25	3-	2-	1o	2-	2-	2o	2+	3-	16-	8	0.4
26	2o	0+	1o	1o	1-	1o	3-	4-	12+	7	0.4
27	2o	2o	2+	1+	2-	3-	3-	3o	18-	9	0.5
28	2-	2o	2+	2+	2+	3+	3o	4-	21-	12	0.7
29	3-	2+	2o	2-	3o	3+	4o	3+	22+	14	0.8
30	3o	3-	1o	1+	2o	2+	4o	4-	20o	13	0.7
31	3+	2+	2o	1+	3-	2o	2-	2+	18-	9	0.5
									Mean	10	0.48

Preliminary sudden commencements: none