International Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

Nowcast data for December 2025

(Last update: 11:04:44 UTC, December 7, 2025)

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⁽¹¹⁾


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⁽¹¹⁾

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/