International Association of Geomagnetism and Aeronomy

(International Service of Geomagnetic Indices)

Nowcast data for September 2026

(Last update: 02:06:01 UTC, September 13, 2026)

Geomagnetic Planetary Indices

Kp three-hourly daily

1 2 3 4 5 6 7 8 Sum Ap Cp

1 1-⁽¹¹⁾ 1+⁽¹¹⁾ 2-⁽¹¹⁾ 2+⁽¹²⁾ 2-⁽¹²⁾ 1+⁽¹²⁾ 2-⁽¹²⁾ 1+⁽¹²⁾ 12o 6 0.3

2 1-⁽¹²⁾ 1-⁽¹²⁾ 2o⁽¹²⁾ 2o⁽¹²⁾ 1+⁽¹²⁾ 0+⁽¹²⁾ 1+⁽¹²⁾ 1+⁽¹²⁾ 10- 5 0.2

3 2o⁽¹²⁾ 1o⁽¹²⁾ 0+⁽¹²⁾ 0+⁽¹²⁾ 1o⁽¹²⁾ 2-⁽¹²⁾ 2o⁽¹²⁾ 2-⁽¹²⁾ 10o 5 0.2

4 1+⁽¹²⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 1+⁽¹²⁾ 1-⁽¹²⁾ 0+⁽¹²⁾ 1-⁽¹²⁾ 0o⁽¹²⁾ 6- 3 0.1

5 2-⁽¹²⁾ 3-⁽¹¹⁾ 2+⁽¹¹⁾ 2o⁽¹¹⁾ 1-⁽¹¹⁾ 0+⁽¹¹⁾ 0+⁽¹¹⁾ 1o⁽¹¹⁾ 11o 6 0.3

6 1o⁽¹¹⁾ 1-⁽¹²⁾ 1-⁽¹²⁾ 1o⁽¹²⁾ 0+⁽¹²⁾ 1o⁽¹¹⁾ 2o⁽¹¹⁾ 1+⁽¹¹⁾ 8o 4 0.1

7 1- 2- 3+ 3+ 3o 4- 4- 5- 24o 18 1.0

8 5- 4+ 5o 4- 3+ 4o 3+ 3+ 32- 28 1.2

9 3- 1+ 2- 2+ 3+ 3o 3- 3- 20- 11 0.6

10 3o 3- 1+ 3- 2+ 1o 1o 3o 17o 10 0.5

11 1+ 3- 2o 3- 2o 1+ 1- 2o 15- 7 0.4

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

13 2+⁽¹²⁾


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

1	1-⁽¹¹⁾	1+⁽¹¹⁾	2-⁽¹¹⁾	2+⁽¹²⁾	2-⁽¹²⁾	1+⁽¹²⁾	2-⁽¹²⁾	1+⁽¹²⁾	12o	6	0.3
2	1-⁽¹²⁾	1-⁽¹²⁾	2o⁽¹²⁾	2o⁽¹²⁾	1+⁽¹²⁾	0+⁽¹²⁾	1+⁽¹²⁾	1+⁽¹²⁾	10-	5	0.2
3	2o⁽¹²⁾	1o⁽¹²⁾	0+⁽¹²⁾	0+⁽¹²⁾	1o⁽¹²⁾	2-⁽¹²⁾	2o⁽¹²⁾	2-⁽¹²⁾	10o	5	0.2
4	1+⁽¹²⁾	1-⁽¹²⁾	1-⁽¹²⁾	1+⁽¹²⁾	1-⁽¹²⁾	0+⁽¹²⁾	1-⁽¹²⁾	0o⁽¹²⁾	6-	3	0.1
5	2-⁽¹²⁾	3-⁽¹¹⁾	2+⁽¹¹⁾	2o⁽¹¹⁾	1-⁽¹¹⁾	0+⁽¹¹⁾	0+⁽¹¹⁾	1o⁽¹¹⁾	11o	6	0.3
6	1o⁽¹¹⁾	1-⁽¹²⁾	1-⁽¹²⁾	1o⁽¹²⁾	0+⁽¹²⁾	1o⁽¹¹⁾	2o⁽¹¹⁾	1+⁽¹¹⁾	8o	4	0.1
7	1-	2-	3+	3+	3o	4-	4-	5-	24o	18	1.0
8	5-	4+	5o	4-	3+	4o	3+	3+	32-	28	1.2
9	3-	1+	2-	2+	3+	3o	3-	3-	20-	11	0.6
10	3o	3-	1+	3-	2+	1o	1o	3o	17o	10	0.5
11	1+	3-	2o	3-	2o	1+	1-	2o	15-	7	0.4
12	1+	2+	2+	2o	2-	1o	1o	1-	12+	6	0.3
13	2+⁽¹²⁾

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/