Top 50 geomagnetic storms of 1948

On this page you will find an overview of the strongest geomagnetic storms of 1948 together with links to more information in our archive. The Kp-values on this page are the official, finalized Kp-values from the GFZ in Potsdam, Germany. Times are in UTC.

		Ap	Kp max	00-03h	03-06h	06-09h	09-12h	12-15h	15-18h	18-21h	21-00h
1	1948/03/15	140	8+	6-	8+	8	7+	6+	7	8-	5
2	1948/10/18	86	8+	8+	7-	5+	4-	4-	4	5+	7+
3	1948/10/17	35	8+	1	0+	3+	1+	0+	0+	2+	8+
4	1948/08/08	146	8-	5+	7-	7+	8-	8-	7	8-	8-
5	1948/10/19	94	8-	7-	7+	8-	7+	5+	5+	4+	2+
6	1948/08/10	74	7	6-	4	7	5+	5+	7-	7-	4+
7	1948/05/16	72	7	7	6+	6-	4+	5+	6	5	6-
8	1948/04/22	50	7	5-	7	6	5	5	4-	4-	2+
9	1948/10/14	35	7	2+	2+	2+	3+	4+	5-	4+	7
10	1948/10/21	67	7-	4+	6-	6	6+	5	6-	7-	5-
11	1948/04/21	24	7-	7-	4-	3+	2	1+	2+	1+	3-
12	1948/11/02	56	6+	5-	5+	6+	5	5	5	5	6-
13	1948/08/09	48	6+	6-	6-	4	4-	5-	5-	4+	6+
14	1948/05/15	47	6+	5	6	5+	5-	5-	2-	3	6+
15	1948/10/01	46	6+	5-	6+	5	6-	5+	3+	4-	4-
16	1948/10/02	46	6+	3+	6+	6+	5	5	5	2+	3-
17	1948/05/21	45	6+	3	3	4	4-	6-	6+	6-	5+
18	1948/11/21	32	6+	5+	6+	5-	3+	3+	2+	2+	2+
19	1948/05/09	32	6+	3-	2+	6+	5	5-	4+	3-	2+
20	1948/10/10	28	6+	2+	5-	6+	4	4	2+	2	3-
21	1948/11/20	49	6	3+	4-	4+	5+	6	6	6-	5-
22	1948/01/03	41	6	3-	4+	5-	4	5	6	6	3-
23	1948/09/01	37	6	5	4+	4	3	5-	3+	5-	6
24	1948/05/07	35	6	4-	3	6	5	5-	4	4+	3+
25	1948/10/27	29	6	4	3+	3+	4	6	3+	4-	4-
26	1948/12/31	29	6	4-	2	4	6	4+	5	2	2-
27	1948/04/06	24	6	0+	4	3	2	2	4+	6	4-
28	1948/10/15	51	6-	6-	5+	5-	5-	6-	6-	5+	3
29	1948/03/01	41	6-	5-	5+	6-	5-	4+	3+	4	5
30	1948/02/03	34	6-	4-	3	6-	5	6-	3-	3	4-
31	1948/10/22	34	6-	1+	3	4	6-	6-	4-	5-	4+
32	1948/12/25	33	6-	2	2+	3-	4	5-	6-	6-	5-
33	1948/08/12	30	6-	4-	4-	6-	3+	3	3	5	4+
34	1948/08/20	29	6-	6-	5	3+	3+	5-	3-	3+	3-
35	1948/10/03	25	6-	3	3+	3	3	3+	6-	4+	4-
36	1948/01/17	24	6-	0+	1-	2	3+	6-	5-	4+	4
37	1948/12/24	20	6-	3	6-	5	2	1+	2-	2+	2
38	1948/11/01	16	6-	0+	0	1+	2	2	2+	4+	6-
39	1948/03/14	40	5+	5	5+	5+	4	4-	4+	5	4+
40	1948/03/13	39	5+	4+	4+	4-	5+	5-	5-	5-	5+
41	1948/06/01	34	5+	4+	5	5	4-	5+	5-	3-	3-
42	1948/10/23	32	5+	4-	4	4	4+	5-	5+	5-	3+
43	1948/10/24	30	5+	4	4-	4-	4	5+	5-	4+	3
44	1948/03/02	30	5+	4	4	4	5+	4	3-	4	5-
45	1948/09/29	28	5+	3	4	4	5-	4	5+	2+	4-
46	1948/02/16	27	5+	5+	4+	4	4-	3+	4-	4-	3
47	1948/05/29	27	5+	4	4-	2-	3	5	5+	3	4
48	1948/08/11	27	5+	4-	5-	5+	3+	3	3+	3+	4
49	1948/12/14	26	5+	4-	5+	4	4+	4-	3	4-	3
50	1948/09/04	24	5+	2-	2+	5-	5+	4	4	3	3

Latest news

Wednesday, 14 May 2025

Another X-flare! Potent sunspot region 4087!

Tuesday, 13 May 2025

X1.1 solar flare from sunspot region 4086

Tuesday, 15 April 2025

CME arrival, G3 storm watch

More news

Latest forum messages

Unspecified geomagnetic activity 2472 AR4087 175 AR 14089 6 Tuesday's Filament makes the news in the UK 3 AR4990 1

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!

Donate SpaceWeatherLive Pro

Support SpaceWeatherLive with our merchandise

Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare	2025/05/14	X2.7
Last M-flare	2025/05/15	M2.1
Last geomagnetic storm	2025/05/03	Kp5 (G1)

Spotless days
Last spotless day	2022/06/08

Monthly mean Sunspot Number
April 2025	140.6 +6.4
May 2025	70.6 -70
Last 30 days	96.7 -24

This day in history*

Solar flares
1	2012	M7.32
2	2024	M7.25
3	2013	M4.61
4	2002	M4.17
5	1999	M3.33

		Dst	G
1	1991	-105	G2
2	2024	-99	G2
3	2000	-91	G2
4	1981	-81	G1
5	2005	-80

*since 1994