International Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

Nowcast data for December 2025

(Last update: 23:58:01 UTC, January 1, 2026)

Geomagnetic Planetary Indices

Kp three-hourly daily

1 2 3 4 5 6 7 8 Sum Ap Cp

1 4o⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 2-⁽¹²⁾ 2o⁽¹²⁾ 3o⁽¹²⁾ 2-⁽¹²⁾ 1+⁽¹²⁾ 16+ 10 0.5

2 2+⁽¹²⁾ 3-⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 1o⁽¹²⁾ 2o⁽¹²⁾ 3-⁽¹²⁾ 2o⁽¹²⁾ 15+ 8 0.4

3 2-⁽¹²⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 3-⁽¹²⁾ 4o⁽¹²⁾ 4+⁽¹¹⁾ 7-⁽¹¹⁾ 5o⁽¹¹⁾ 28+ 31 1.3

4 5o⁽¹¹⁾ 5o⁽¹¹⁾ 5-⁽¹²⁾ 4o⁽¹²⁾ 4+⁽¹²⁾ 4o⁽¹²⁾ 4-⁽¹²⁾ 2+⁽¹²⁾ 33o 32 1.3

5 3o⁽¹²⁾ 3+⁽¹²⁾ 3+⁽¹²⁾ 3-⁽¹²⁾ 2+⁽¹²⁾ 2o⁽¹²⁾ 3+⁽¹²⁾ 3-⁽¹²⁾ 23- 14 0.8

6 4-⁽¹²⁾ 4-⁽¹²⁾ 4+⁽¹²⁾ 3+⁽¹²⁾ 3o⁽¹²⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 2-⁽¹²⁾ 24- 16 0.9

7 2+⁽¹²⁾ 4-⁽¹²⁾ 3o⁽¹²⁾ 2o⁽¹²⁾ 1+⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹²⁾ 0+⁽¹²⁾ 13- 8 0.4

8 0o⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹²⁾ 0o⁽¹²⁾ 1-⁽¹²⁾ 0+⁽¹²⁾ 1o 1 0.0

9 1-⁽¹²⁾ 0o⁽¹²⁾ 1-⁽¹²⁾ 1o⁽¹¹⁾ 1o⁽¹¹⁾ 1+⁽¹²⁾ 1+⁽¹²⁾ 1+⁽¹²⁾ 7+ 4 0.1

10 2o⁽¹²⁾ 3-⁽¹²⁾ 4-⁽¹²⁾ 2o⁽¹²⁾ 2o⁽¹²⁾ 2+⁽¹²⁾ 3+⁽¹²⁾ 6+⁽¹²⁾ 24+ 22 1.1

11 6o 4+ 2+ 2o 2o 4- 4+ 3+ 28o 26 1.2

12 4o 4o 3o 3o 3o⁽¹²⁾ 4o⁽¹²⁾ 5+⁽¹²⁾ 5o⁽¹²⁾ 31+ 29 1.3

13 5-⁽¹²⁾ 2+⁽¹²⁾ 2+⁽¹²⁾ 3-⁽¹²⁾ 2+⁽¹²⁾ 2+⁽¹²⁾ 3+⁽¹²⁾ 3-⁽¹¹⁾ 23- 15 0.8

14 3o⁽¹¹⁾ 2+⁽¹¹⁾ 1o⁽¹¹⁾ 2o⁽¹¹⁾ 1o⁽¹¹⁾ 1-⁽¹¹⁾ 2-⁽¹¹⁾ 1o⁽¹¹⁾ 13- 6 0.3

15 1- 0o 1o 2- 3o 1+ 0+ 1o 9o 5 0.2

16 3o 2+ 2o 2o 2o 3+ 3- 3-⁽¹¹⁾ 20o 11 0.6

17 3-⁽¹²⁾ 3o⁽¹²⁾ 3o⁽¹²⁾ 2+⁽¹²⁾ 3-⁽¹²⁾ 3o⁽¹²⁾ 4-⁽¹²⁾ 5-⁽¹²⁾ 25o 17 0.9

18 4+⁽¹²⁾ 3-⁽¹²⁾ 4-⁽¹²⁾ 3+⁽¹²⁾ 2o⁽¹²⁾ 3+⁽¹²⁾ 3o⁽¹²⁾ 3-⁽¹²⁾ 25o 17 0.9

19 2+⁽¹²⁾ 2o⁽¹²⁾ 1+⁽¹²⁾ 1o⁽¹²⁾ 1o⁽¹²⁾ 1+⁽¹²⁾ 2o⁽¹²⁾ 2o⁽¹²⁾ 13o 6 0.3

20 2- 1- 1+ 1o 1+ 2o 1+ 2- 11o 5 0.2

21 4- 3- 3o 4- 5- 5- 4-⁽¹²⁾ 5o⁽¹²⁾ 31o 27 1.2

22 3+ 3+ 4- 3+ 5- 4- 4o 4o 30o 24 1.2

23 3o 4- 4- 3+ 3+ 4- 4o 4o 29- 21 1.1

24 4- 4+ 4- 3o 3+⁽¹²⁾ 3+ 3o 3o 27+ 20 1.0

25 3o 3+ 3o 2+ 2+ 2+ 1o 2- 19o 11 0.6

26 1+ 2+ 2o 2o 2o 3+ 1- 1- 14+ 7 0.4

27 1+ 3o 2o 2- 1o 1o 2o 2- 14- 7 0.3

28 2+ 1- 1o 2o 2- 3o 3- 2+ 16- 8 0.4

29 3- 3- 2+ 2+ 2- 1o 0+ 2- 15- 8 0.4

30 1+ 1+ 2- 1+ 3- 3-⁽¹²⁾ 2- 1o 14- 7 0.3

31 2o 1+ 2o 2- 3+ 1o 1o 1+ 14- 7 0.4

Mean 14 0.67


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

1	4o⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	2-⁽¹²⁾	2o⁽¹²⁾	3o⁽¹²⁾	2-⁽¹²⁾	1+⁽¹²⁾	16+	10	0.5
2	2+⁽¹²⁾	3-⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	1o⁽¹²⁾	2o⁽¹²⁾	3-⁽¹²⁾	2o⁽¹²⁾	15+	8	0.4
3	2-⁽¹²⁾	2+⁽¹²⁾	2-⁽¹²⁾	3-⁽¹²⁾	4o⁽¹²⁾	4+⁽¹¹⁾	7-⁽¹¹⁾	5o⁽¹¹⁾	28+	31	1.3
4	5o⁽¹¹⁾	5o⁽¹¹⁾	5-⁽¹²⁾	4o⁽¹²⁾	4+⁽¹²⁾	4o⁽¹²⁾	4-⁽¹²⁾	2+⁽¹²⁾	33o	32	1.3
5	3o⁽¹²⁾	3+⁽¹²⁾	3+⁽¹²⁾	3-⁽¹²⁾	2+⁽¹²⁾	2o⁽¹²⁾	3+⁽¹²⁾	3-⁽¹²⁾	23-	14	0.8
6	4-⁽¹²⁾	4-⁽¹²⁾	4+⁽¹²⁾	3+⁽¹²⁾	3o⁽¹²⁾	2+⁽¹²⁾	2-⁽¹²⁾	2-⁽¹²⁾	24-	16	0.9
7	2+⁽¹²⁾	4-⁽¹²⁾	3o⁽¹²⁾	2o⁽¹²⁾	1+⁽¹²⁾	0o⁽¹²⁾	0o⁽¹²⁾	0+⁽¹²⁾	13-	8	0.4
8	0o⁽¹²⁾	0o⁽¹²⁾	0o⁽¹²⁾	0o⁽¹²⁾	0o⁽¹²⁾	0o⁽¹²⁾	1-⁽¹²⁾	0+⁽¹²⁾	1o	1	0.0
9	1-⁽¹²⁾	0o⁽¹²⁾	1-⁽¹²⁾	1o⁽¹¹⁾	1o⁽¹¹⁾	1+⁽¹²⁾	1+⁽¹²⁾	1+⁽¹²⁾	7+	4	0.1
10	2o⁽¹²⁾	3-⁽¹²⁾	4-⁽¹²⁾	2o⁽¹²⁾	2o⁽¹²⁾	2+⁽¹²⁾	3+⁽¹²⁾	6+⁽¹²⁾	24+	22	1.1
11	6o	4+	2+	2o	2o	4-	4+	3+	28o	26	1.2
12	4o	4o	3o	3o	3o⁽¹²⁾	4o⁽¹²⁾	5+⁽¹²⁾	5o⁽¹²⁾	31+	29	1.3
13	5-⁽¹²⁾	2+⁽¹²⁾	2+⁽¹²⁾	3-⁽¹²⁾	2+⁽¹²⁾	2+⁽¹²⁾	3+⁽¹²⁾	3-⁽¹¹⁾	23-	15	0.8
14	3o⁽¹¹⁾	2+⁽¹¹⁾	1o⁽¹¹⁾	2o⁽¹¹⁾	1o⁽¹¹⁾	1-⁽¹¹⁾	2-⁽¹¹⁾	1o⁽¹¹⁾	13-	6	0.3
15	1-	0o	1o	2-	3o	1+	0+	1o	9o	5	0.2
16	3o	2+	2o	2o	2o	3+	3-	3-⁽¹¹⁾	20o	11	0.6
17	3-⁽¹²⁾	3o⁽¹²⁾	3o⁽¹²⁾	2+⁽¹²⁾	3-⁽¹²⁾	3o⁽¹²⁾	4-⁽¹²⁾	5-⁽¹²⁾	25o	17	0.9
18	4+⁽¹²⁾	3-⁽¹²⁾	4-⁽¹²⁾	3+⁽¹²⁾	2o⁽¹²⁾	3+⁽¹²⁾	3o⁽¹²⁾	3-⁽¹²⁾	25o	17	0.9
19	2+⁽¹²⁾	2o⁽¹²⁾	1+⁽¹²⁾	1o⁽¹²⁾	1o⁽¹²⁾	1+⁽¹²⁾	2o⁽¹²⁾	2o⁽¹²⁾	13o	6	0.3
20	2-	1-	1+	1o	1+	2o	1+	2-	11o	5	0.2
21	4-	3-	3o	4-	5-	5-	4-⁽¹²⁾	5o⁽¹²⁾	31o	27	1.2
22	3+	3+	4-	3+	5-	4-	4o	4o	30o	24	1.2
23	3o	4-	4-	3+	3+	4-	4o	4o	29-	21	1.1
24	4-	4+	4-	3o	3+⁽¹²⁾	3+	3o	3o	27+	20	1.0
25	3o	3+	3o	2+	2+	2+	1o	2-	19o	11	0.6
26	1+	2+	2o	2o	2o	3+	1-	1-	14+	7	0.4
27	1+	3o	2o	2-	1o	1o	2o	2-	14-	7	0.3
28	2+	1-	1o	2o	2-	3o	3-	2+	16-	8	0.4
29	3-	3-	2+	2+	2-	1o	0+	2-	15-	8	0.4
30	1+	1+	2-	1+	3-	3-⁽¹²⁾	2-	1o	14-	7	0.3
31	2o	1+	2o	2-	3+	1o	1o	1+	14-	7	0.4
									Mean	14	0.67

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/