Top 50 geomagnetic storms of 1964

On this page you will find an overview of the strongest geomagnetic storms of 1964 together with links to more information in our archive. Storms are ranked by the Disturbance storm-time index (Dst) that is designed to measure the magnetic signature of magnetospheric currents observed in the equatorial regions. The Dst index is provided by the World Data Center for geomagnetism in Kyoto.

		Dst	Ap	Kp max
1	1964/01/02	-91nT	53	7-
2	1964/06/10	-91nT	49	7-
3	1964/04/01	-87nT	46	7+
4	1964/04/02	-74nT	26	5+
5	1964/05/11	-72nT	19	5+
6	1964/05/10	-67nT	20	5-
7	1964/03/04	-60nT	52	6
8	1964/02/21	-53nT	15	5-
9	1964/03/05	-49nT	33	6-
10	1964/05/01	-48nT	23	6
11	1964/03/12	-46nT	16	5-
12	1964/04/03	-46nT	18	4+
13	1964/01/03	-46nT	21	4+
14	1964/10/12	-44nT	15	4+
15	1964/02/20	-41nT	18	5+
16	1964/01/16	-40nT	27	5
17	1964/08/04	-40nT	34	6+
18	1964/04/28	-39nT	33	5+
19	1964/06/11	-39nT	25	5-
20	1964/03/30	-38nT	26	6-
21	1964/04/27	-37nT	26	5+
22	1964/02/13	-37nT	32	5
23	1964/03/06	-37nT	17	4
24	1964/05/15	-36nT	28	6
25	1964/02/09	-36nT	15	4
26	1964/09/28	-36nT	35	6-
27	1964/02/25	-36nT	19	6-
28	1964/03/22	-35nT	28	6-
29	1964/09/22	-35nT	44	8-
30	1964/02/08	-35nT	20	6-
31	1964/11/23	-34nT	20	5-
32	1964/01/04	-34nT	19	4+
33	1964/04/30	-34nT	11	5-
34	1964/09/30	-34nT	22	5-
35	1964/03/07	-33nT	12	4-
36	1964/07/18	-33nT	24	5
37	1964/10/26	-32nT	18	5+
38	1964/02/06	-31nT	31	5+
39	1964/04/04	-31nT	11	4-
40	1964/03/09	-30nT	9	4
41	1964/01/17	-29nT	17	4+
42	1964/01/05	-29nT	8	3-
43	1964/04/11	-28nT	14	5-
44	1964/03/08	-28nT	18	4
45	1964/01/06	-27nT	5	2+
46	1964/02/01	-27nT	10	3+
47	1964/04/05	-27nT	11	4
48	1964/03/21	-27nT	12	4-
49	1964/03/23	-27nT	30	6
50	1964/10/09	-27nT	14	4+

Latest news

Tuesday, 17 March 2026

M2.7 solar flare, CME arrival possible

Sunday, 1 February 2026

Complex sunspot region 4366

Monday, 19 January 2026

CME impact! S4 solar radiation storm

More news

Latest forum messages

Comet C/2026 A1 (MAPS) for the southern hemisphere 18 AR4392 (including CMEs) 75 Growth of Cycle 25 985 Incoming & Unnumbered Active Regions 223 Current Farside Activity 416

Support SpaceWeatherLive.com!

A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!

Space weather facts

Last X-flare	2026/02/04	X4.21
Last M-flare	2026/03/17	M1.3
Last geomagnetic storm	2026/03/14	Kp6 (G2)

Spotless days
Last 365 days	3 days
2026	3 days (4%)
Last spotless day	2026/02/24

Monthly mean Sunspot Number
February 2026	78.2 -34.3
March 2026	82.4 +4.2
Last 30 days	61.1 -58.1

This day in history*

Solar flares
1	2003	X2.2
2	2024	M6.77
3	2000	M5.64
4	1999	M4.79
5	2000	M3.71

		Dst	G
1	2015	-200	G2
2	2013	-96
3	1958	-76	G2
4	1989	-76	G1
5	1990	-65	G2

*since 1994

Social networks

SpaceWeatherLive