International Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

Nowcast data for May 2026

(Last update: 18:35:03 UTC, May 27, 2026)

Geomagnetic Planetary Indices

Kp three-hourly daily

1 2 3 4 5 6 7 8 Sum Ap Cp

1 4- 4+ 3o 1+ 1- 2- 3o 1+ 19o 13 0.7

2 2+ 1+ 1- 2- 1+ 1o 1+ 3- 12+ 6 0.3

3 3+ 2+ 2+ 1- 1+ 3- 1+ 1o 15o 8 0.4

4 2- 2o 2- 3- 3- 4o 5+ 4+ 24+ 20 1.0

5 5- 4- 2- 1o 1- 0+ 1- 1o 14- 10 0.6

6 0+ 0o 1- 0+ 0+ 1-⁽¹²⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 4- 2 0.0

7 1- 1- 0o 0+ 0+ 3+ 4- 2o 11o 7 0.4

8 2+ 1o 2o 3+ 3+ 4- 2o 3o 21- 12 0.7

9 2+ 1+ 1- 1+ 1- 1+ 1- 1- 9o 4 0.2

10 0o 1- 1o 1- 1+ 1+ 2o 1o 8o 4 0.1

11 2o 1+ 1- 1- 2- 1o 1o 1- 9o 4 0.2

12 1- 1- 1- 0+ 1- 1- 1+ 1- 6- 3 0.1

13 1- 1+ 1o 1+ 3o 3o⁽¹²⁾ 3o⁽¹²⁾ 3+⁽¹²⁾ 17- 10 0.6

14 3-⁽¹¹⁾ 1+⁽¹¹⁾ 1+⁽¹¹⁾ 1-⁽¹¹⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 1o 9o 5 0.2

15 2+ 2- 3o 4- 5o 5- 4+ 6o 31- 31 1.3

16 6- 5- 5- 4o 3- 4+ 3o 3+ 32+ 31 1.3

17 2o 2o 2o 2+ 2o 2- 2o 2- 16- 7 0.4

18 2+ 2o 2+ 1+ 2+ 2o 2o 3o⁽¹¹⁾ 17+ 8 0.5

19 2- 3- 3+ 3+ 4o 4- 3o 3o⁽¹²⁾ 25- 17 0.9

20 3+ 3- 1+ 1- 1+ 1o 1+ 2+ 14o 8 0.4

21 3- 2o 1o 1+ 2o 1o 2- 1+ 13o 6 0.3

22 1o 1+ 1o 1+ 0+ 1- 1- 2+ 9- 4 0.2

23 0+ 1- 1o 0+ 0+ 0o 0o 0+ 3o 2 0.0

24 1- 1- 1o 1o 2- 1o 2- 2- 9+ 4 0.2

25 3- 2- 1o 2- 2- 2o 2o 3- 15+ 8 0.4

26 2o 1- 1o 1o 0+ 1+ 2+ 4- 12+ 7 0.4

27 2- 2+ 3- 1+ 2-⁽¹²⁾ 3-⁽¹²⁾ 0+⁽⁵⁾


Kp three-hourly	daily
	1	2	3	4	5	6	7	8	Sum	Ap	Cp

1	4-	4+	3o	1+	1-	2-	3o	1+	19o	13	0.7
2	2+	1+	1-	2-	1+	1o	1+	3-	12+	6	0.3
3	3+	2+	2+	1-	1+	3-	1+	1o	15o	8	0.4
4	2-	2o	2-	3-	3-	4o	5+	4+	24+	20	1.0
5	5-	4-	2-	1o	1-	0+	1-	1o	14-	10	0.6
6	0+	0o	1-	0+	0+	1-⁽¹²⁾	1-⁽¹²⁾	1-⁽¹²⁾	4-	2	0.0
7	1-	1-	0o	0+	0+	3+	4-	2o	11o	7	0.4
8	2+	1o	2o	3+	3+	4-	2o	3o	21-	12	0.7
9	2+	1+	1-	1+	1-	1+	1-	1-	9o	4	0.2
10	0o	1-	1o	1-	1+	1+	2o	1o	8o	4	0.1
11	2o	1+	1-	1-	2-	1o	1o	1-	9o	4	0.2
12	1-	1-	1-	0+	1-	1-	1+	1-	6-	3	0.1
13	1-	1+	1o	1+	3o	3o⁽¹²⁾	3o⁽¹²⁾	3+⁽¹²⁾	17-	10	0.6
14	3-⁽¹¹⁾	1+⁽¹¹⁾	1+⁽¹¹⁾	1-⁽¹¹⁾	1-⁽¹²⁾	1-⁽¹²⁾	1-⁽¹²⁾	1o	9o	5	0.2
15	2+	2-	3o	4-	5o	5-	4+	6o	31-	31	1.3
16	6-	5-	5-	4o	3-	4+	3o	3+	32+	31	1.3
17	2o	2o	2o	2+	2o	2-	2o	2-	16-	7	0.4
18	2+	2o	2+	1+	2+	2o	2o	3o⁽¹¹⁾	17+	8	0.5
19	2-	3-	3+	3+	4o	4-	3o	3o⁽¹²⁾	25-	17	0.9
20	3+	3-	1+	1-	1+	1o	1+	2+	14o	8	0.4
21	3-	2o	1o	1+	2o	1o	2-	1+	13o	6	0.3
22	1o	1+	1o	1+	0+	1-	1-	2+	9-	4	0.2
23	0+	1-	1o	0+	0+	0o	0o	0+	3o	2	0.0
24	1-	1-	1o	1o	2-	1o	2-	2-	9+	4	0.2
25	3-	2-	1o	2-	2-	2o	2o	3-	15+	8	0.4
26	2o	1-	1o	1o	0+	1+	2+	4-	12+	7	0.4
27	2-	2+	3-	1+	2-⁽¹²⁾	3-⁽¹²⁾	0+⁽⁵⁾

Note: If not the complete data from all 13 observatories could be used in the calculation, the number of already included observatories is given in parentheses.

Editor:

GFZ Helmholtz Centre for Geosciences

Adolf Schmidt Observatory for Geomagnetism

https://kp.gfz.de/en/