International Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

Nowcast data for September 2025

(Last update: 23:54:02 UTC, October 1, 2025)

Geomagnetic Planetary Indices

Kp three-hourly daily

1 2 3 4 5 6 7 8 Sum Ap Cp

1 1+⁽¹²⁾ 1+⁽¹²⁾ 1o⁽¹²⁾ 1o⁽¹²⁾ 1-⁽¹²⁾ 2-⁽¹²⁾ 3o⁽¹²⁾ 6-⁽¹²⁾ 16- 14 0.8

2 5+⁽¹²⁾ 4+⁽¹²⁾ 4+⁽¹²⁾ 4-⁽¹²⁾ 3o⁽¹²⁾ 4o⁽¹²⁾ 4+⁽¹²⁾ 4o⁽¹²⁾ 33o 30 1.3

3 4+⁽¹²⁾ 3+⁽¹²⁾ 2o⁽¹²⁾ 2o⁽¹²⁾ 2-⁽¹²⁾ 1o⁽¹²⁾ 2+⁽¹²⁾ 1-⁽¹²⁾ 17+ 11 0.6

4 1+⁽¹²⁾ 1-⁽¹²⁾ 2-⁽¹²⁾ 3-⁽¹²⁾ 2o⁽¹²⁾ 3-⁽¹²⁾ 2o⁽¹²⁾ 3o⁽¹²⁾ 16o 8 0.5

5 2-⁽¹²⁾ 0o⁽¹²⁾ 1-⁽¹²⁾ 2o⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 3-⁽¹²⁾ 3o⁽¹²⁾ 13- 7 0.3

6 4-⁽¹²⁾ 4-⁽¹²⁾ 4o⁽¹²⁾ 4-⁽¹²⁾ 4o⁽¹²⁾ 5o⁽¹²⁾ 4-⁽¹²⁾ 1+⁽¹²⁾ 29o 24 1.2

7 0+⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹¹⁾ 0o⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹¹⁾ 2-⁽¹²⁾ 2o⁽¹²⁾ 4o 2 0.0

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

9 3+⁽¹²⁾ 2o⁽¹²⁾ 3-⁽¹²⁾ 2+⁽¹²⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 3o⁽¹²⁾ 5o⁽¹²⁾ 22+ 16 0.9

10 4+⁽¹²⁾ 4+⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 2o⁽¹²⁾ 2-⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 18- 12 0.7

11 4-⁽¹²⁾ 3-⁽¹²⁾ 2+⁽¹²⁾ 1+⁽¹²⁾ 1+⁽¹²⁾ 2-⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 16- 9 0.5

12 0+⁽¹²⁾ 2+⁽¹²⁾ 3-⁽¹²⁾ 3-⁽¹²⁾ 2-⁽¹²⁾ 2-⁽¹²⁾ 1+⁽¹¹⁾ 1o⁽¹²⁾ 14- 7 0.4

13 2-⁽¹²⁾ 3-⁽¹²⁾ 2+⁽¹¹⁾ 2-⁽¹²⁾ 1-⁽¹¹⁾ 0+⁽¹¹⁾ 1-⁽¹¹⁾ 1+⁽¹¹⁾ 11+ 6 0.3

14 2o⁽¹⁰⁾ 2-⁽¹⁰⁾ 2-⁽¹⁰⁾ 2-⁽¹⁰⁾ 2o⁽¹⁰⁾ 2o⁽¹¹⁾ 3o⁽¹¹⁾ 5-⁽¹¹⁾ 19- 12 0.7

15 7-⁽¹²⁾ 6-⁽¹²⁾ 5o⁽¹²⁾ 4+⁽¹²⁾ 5+⁽¹²⁾ 4-⁽¹²⁾ 4-⁽¹²⁾ 4o⁽¹²⁾ 38+ 48 1.6

16 5-⁽¹²⁾ 3+⁽¹²⁾ 4-⁽¹²⁾ 3+⁽¹²⁾ 3+⁽¹²⁾ 2+⁽¹²⁾ 2+⁽¹²⁾ 3-⁽¹²⁾ 26- 18 1.0

17 2o⁽¹²⁾ 3-⁽¹²⁾ 3-⁽¹²⁾ 3-⁽¹²⁾ 2o⁽¹²⁾ 1+⁽¹²⁾ 2o⁽¹²⁾ 2+⁽¹²⁾ 18- 9 0.5

18 2-⁽¹²⁾ 2-⁽¹²⁾ 2-⁽¹²⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 2-⁽¹²⁾ 1-⁽¹²⁾ 1o⁽¹²⁾ 12+ 6 0.3

19 0+⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹²⁾ 1-⁽¹²⁾ 1+⁽¹²⁾ 0+⁽¹²⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 4o 2 0.0

20 1o⁽¹²⁾ 2-⁽¹²⁾ 2-⁽¹²⁾ 1o⁽¹²⁾ 0+⁽¹²⁾ 0+⁽¹²⁾ 0+⁽¹²⁾ 1o⁽¹²⁾ 7+ 4 0.1

21 1-⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 0+⁽¹²⁾ 2-⁽¹²⁾ 1+⁽¹²⁾ 1-⁽¹²⁾ 1+⁽¹²⁾ 9- 4 0.1

22 3-⁽¹²⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 3o⁽¹²⁾ 3o⁽¹²⁾ 3o⁽¹²⁾ 3o⁽¹²⁾ 3+⁽¹²⁾ 22o 13 0.8

23 3+⁽¹²⁾ 3o⁽¹²⁾ 3-⁽¹²⁾ 3o⁽¹²⁾ 4-⁽¹²⁾ 3o⁽¹²⁾ 3o⁽¹²⁾ 2-⁽¹²⁾ 23+ 15 0.8

24 2-⁽¹²⁾ 1+⁽¹²⁾ 1o⁽¹²⁾ 2o⁽¹²⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 1+⁽¹²⁾ 2+⁽¹²⁾ 14- 6 0.3

25 1o⁽¹²⁾ 1o⁽¹²⁾ 1+⁽¹²⁾ 2+⁽¹²⁾ 3-⁽¹²⁾ 2-⁽¹²⁾ 1+⁽¹²⁾ 2-⁽¹²⁾ 13o 6 0.3

26 2+⁽¹²⁾ 2-⁽¹²⁾ 1-⁽¹²⁾ 2o⁽¹²⁾ 1o⁽¹²⁾ 0+⁽¹²⁾ 2o⁽¹¹⁾ 2-⁽¹²⁾ 12- 6 0.2

27 1o⁽¹²⁾ 1+⁽¹²⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 2+⁽¹²⁾ 2+⁽¹²⁾ 10- 5 0.2

28 3o⁽¹²⁾ 3+⁽¹²⁾ 0+⁽¹²⁾ 1+⁽¹²⁾ 1o⁽¹²⁾ 3-⁽¹²⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 16- 9 0.5

29 3-⁽¹²⁾ 3-⁽¹²⁾ 3-⁽¹²⁾ 4+⁽¹²⁾ 4+⁽¹²⁾ 5+⁽¹²⁾ 5-⁽¹²⁾ 4-⁽¹²⁾ 30+ 27 1.2

30 6-⁽¹²⁾ 7o⁽¹²⁾ 6o⁽¹²⁾ 5o⁽¹²⁾ 6-⁽¹²⁾ 6-⁽¹²⁾ 6o⁽¹²⁾ 5+⁽¹²⁾ 46+ 75 1.8

Mean 14 0.62


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

1	1+⁽¹²⁾	1+⁽¹²⁾	1o⁽¹²⁾	1o⁽¹²⁾	1-⁽¹²⁾	2-⁽¹²⁾	3o⁽¹²⁾	6-⁽¹²⁾	16-	14	0.8
2	5+⁽¹²⁾	4+⁽¹²⁾	4+⁽¹²⁾	4-⁽¹²⁾	3o⁽¹²⁾	4o⁽¹²⁾	4+⁽¹²⁾	4o⁽¹²⁾	33o	30	1.3
3	4+⁽¹²⁾	3+⁽¹²⁾	2o⁽¹²⁾	2o⁽¹²⁾	2-⁽¹²⁾	1o⁽¹²⁾	2+⁽¹²⁾	1-⁽¹²⁾	17+	11	0.6
4	1+⁽¹²⁾	1-⁽¹²⁾	2-⁽¹²⁾	3-⁽¹²⁾	2o⁽¹²⁾	3-⁽¹²⁾	2o⁽¹²⁾	3o⁽¹²⁾	16o	8	0.5
5	2-⁽¹²⁾	0o⁽¹²⁾	1-⁽¹²⁾	2o⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	3-⁽¹²⁾	3o⁽¹²⁾	13-	7	0.3
6	4-⁽¹²⁾	4-⁽¹²⁾	4o⁽¹²⁾	4-⁽¹²⁾	4o⁽¹²⁾	5o⁽¹²⁾	4-⁽¹²⁾	1+⁽¹²⁾	29o	24	1.2
7	0+⁽¹²⁾	0o⁽¹²⁾	0o⁽¹¹⁾	0o⁽¹²⁾	0o⁽¹²⁾	0o⁽¹¹⁾	2-⁽¹²⁾	2o⁽¹²⁾	4o	2	0.0
8	3+⁽¹²⁾	4-⁽¹²⁾	2+⁽¹²⁾	2o⁽¹²⁾	3o⁽¹²⁾	2+⁽¹²⁾	3o⁽¹²⁾	1o⁽¹²⁾	21-	12	0.7
9	3+⁽¹²⁾	2o⁽¹²⁾	3-⁽¹²⁾	2+⁽¹²⁾	2+⁽¹²⁾	2-⁽¹²⁾	3o⁽¹²⁾	5o⁽¹²⁾	22+	16	0.9
10	4+⁽¹²⁾	4+⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	2o⁽¹²⁾	2-⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	18-	12	0.7
11	4-⁽¹²⁾	3-⁽¹²⁾	2+⁽¹²⁾	1+⁽¹²⁾	1+⁽¹²⁾	2-⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	16-	9	0.5
12	0+⁽¹²⁾	2+⁽¹²⁾	3-⁽¹²⁾	3-⁽¹²⁾	2-⁽¹²⁾	2-⁽¹²⁾	1+⁽¹¹⁾	1o⁽¹²⁾	14-	7	0.4
13	2-⁽¹²⁾	3-⁽¹²⁾	2+⁽¹¹⁾	2-⁽¹²⁾	1-⁽¹¹⁾	0+⁽¹¹⁾	1-⁽¹¹⁾	1+⁽¹¹⁾	11+	6	0.3
14	2o⁽¹⁰⁾	2-⁽¹⁰⁾	2-⁽¹⁰⁾	2-⁽¹⁰⁾	2o⁽¹⁰⁾	2o⁽¹¹⁾	3o⁽¹¹⁾	5-⁽¹¹⁾	19-	12	0.7
15	7-⁽¹²⁾	6-⁽¹²⁾	5o⁽¹²⁾	4+⁽¹²⁾	5+⁽¹²⁾	4-⁽¹²⁾	4-⁽¹²⁾	4o⁽¹²⁾	38+	48	1.6
16	5-⁽¹²⁾	3+⁽¹²⁾	4-⁽¹²⁾	3+⁽¹²⁾	3+⁽¹²⁾	2+⁽¹²⁾	2+⁽¹²⁾	3-⁽¹²⁾	26-	18	1.0
17	2o⁽¹²⁾	3-⁽¹²⁾	3-⁽¹²⁾	3-⁽¹²⁾	2o⁽¹²⁾	1+⁽¹²⁾	2o⁽¹²⁾	2+⁽¹²⁾	18-	9	0.5
18	2-⁽¹²⁾	2-⁽¹²⁾	2-⁽¹²⁾	2+⁽¹²⁾	2-⁽¹²⁾	2-⁽¹²⁾	1-⁽¹²⁾	1o⁽¹²⁾	12+	6	0.3
19	0+⁽¹²⁾	0o⁽¹²⁾	0o⁽¹²⁾	1-⁽¹²⁾	1+⁽¹²⁾	0+⁽¹²⁾	1-⁽¹²⁾	1-⁽¹²⁾	4o	2	0.0
20	1o⁽¹²⁾	2-⁽¹²⁾	2-⁽¹²⁾	1o⁽¹²⁾	0+⁽¹²⁾	0+⁽¹²⁾	0+⁽¹²⁾	1o⁽¹²⁾	7+	4	0.1
21	1-⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	0+⁽¹²⁾	2-⁽¹²⁾	1+⁽¹²⁾	1-⁽¹²⁾	1+⁽¹²⁾	9-	4	0.1
22	3-⁽¹²⁾	2+⁽¹²⁾	2-⁽¹²⁾	3o⁽¹²⁾	3o⁽¹²⁾	3o⁽¹²⁾	3o⁽¹²⁾	3+⁽¹²⁾	22o	13	0.8
23	3+⁽¹²⁾	3o⁽¹²⁾	3-⁽¹²⁾	3o⁽¹²⁾	4-⁽¹²⁾	3o⁽¹²⁾	3o⁽¹²⁾	2-⁽¹²⁾	23+	15	0.8
24	2-⁽¹²⁾	1+⁽¹²⁾	1o⁽¹²⁾	2o⁽¹²⁾	2+⁽¹²⁾	2-⁽¹²⁾	1+⁽¹²⁾	2+⁽¹²⁾	14-	6	0.3
25	1o⁽¹²⁾	1o⁽¹²⁾	1+⁽¹²⁾	2+⁽¹²⁾	3-⁽¹²⁾	2-⁽¹²⁾	1+⁽¹²⁾	2-⁽¹²⁾	13o	6	0.3
26	2+⁽¹²⁾	2-⁽¹²⁾	1-⁽¹²⁾	2o⁽¹²⁾	1o⁽¹²⁾	0+⁽¹²⁾	2o⁽¹¹⁾	2-⁽¹²⁾	12-	6	0.2
27	1o⁽¹²⁾	1+⁽¹²⁾	1-⁽¹²⁾	1-⁽¹²⁾	1-⁽¹²⁾	1-⁽¹²⁾	2+⁽¹²⁾	2+⁽¹²⁾	10-	5	0.2
28	3o⁽¹²⁾	3+⁽¹²⁾	0+⁽¹²⁾	1+⁽¹²⁾	1o⁽¹²⁾	3-⁽¹²⁾	2+⁽¹²⁾	2-⁽¹²⁾	16-	9	0.5
29	3-⁽¹²⁾	3-⁽¹²⁾	3-⁽¹²⁾	4+⁽¹²⁾	4+⁽¹²⁾	5+⁽¹²⁾	5-⁽¹²⁾	4-⁽¹²⁾	30+	27	1.2
30	6-⁽¹²⁾	7o⁽¹²⁾	6o⁽¹²⁾	5o⁽¹²⁾	6-⁽¹²⁾	6-⁽¹²⁾	6o⁽¹²⁾	5+⁽¹²⁾	46+	75	1.8
									Mean	14	0.62

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/