Top 50 geomagnetic storms of 2017

On this page you will find an overview of the strongest geomagnetic storms of 2017 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	Speed	IMF Bt	IMF Bz
1	2017/05/28	-125nT	49	7	395.5km/sec	20.79nT	-19.88nT
2	2017/09/08	-122nT	106	8+	875.2km/sec	27.65nT	-25.77nT
3	2017/11/08	-73nT	44	6+	699.0km/sec	8.50nT	-7.43nT
4	2017/07/16	-72nT	44	6	643.4km/sec	27.85nT	-23.50nT
5	2017/09/09	-72nT	3	2+	785.3km/sec	5.84nT	-2.59nT
6	2017/11/07	-71nT	35	6+	692.1km/sec	22.90nT	-15.01nT
7	2017/03/27	-70nT	46	6+	720.3km/sec	19.31nT	-14.69nT
8	2017/09/07	-68nT	36	8-	750.7km/sec	34.00nT	-32.99nT
9	2017/07/17	-61nT	26	6-	779.1km/sec	13.02nT	-10.63nT
10	2017/03/01	-61nT	35	6-	748.6km/sec	21.45nT	-17.50nT
11	2017/03/28	-59nT	27	5+	791.9km/sec	7.70nT	-7.26nT
12	2017/09/28	-56nT	51	7-	751.7km/sec	13.25nT	-9.77nT
13	2017/10/14	-53nT	30	5	757.8km/sec	8.71nT	-7.16nT
14	2017/03/31	-51nT	27	5-	770.5km/sec	6.54nT	-6.38nT
15	2017/04/22	-51nT	47	6-	775.9km/sec	9.82nT	-8.33nT
16	2017/08/31	-51nT	30	5+	718.7km/sec	31.48nT	-19.01nT
17	2017/03/02	-50nT	32	5+	752.9km/sec	6.56nT	-6.00nT
18	2017/08/23	-48nT	23	5-	509.5km/sec	7.79nT	-6.87nT
19	2017/04/23	-48nT	36	5+	812.7km/sec	9.61nT	-7.61nT
20	2017/11/09	-48nT	18	4-	622.6km/sec	8.23nT	-6.10nT
21	2017/10/13	-47nT	37	6-	737.8km/sec	9.54nT	-8.56nT
22	2017/10/26	-46nT	17	4+	606.9km/sec	6.54nT	-5.88nT
23	2017/03/03	-45nT	18	4	762.1km/sec	6.61nT	-5.55nT
24	2017/11/10	-45nT	20	4	719.3km/sec	8.40nT	-6.80nT
25	2017/12/04	-45nT	10	4	434.3km/sec	13.75nT	-12.26nT
26	2017/10/15	-45nT	25	5+	698.9km/sec	5.64nT	-5.53nT
27	2017/02/01	-44nT	28	5	772.8km/sec	7.88nT	-6.98nT
28	2017/04/04	-44nT	19	5-	487.9km/sec	16.40nT	-13.67nT
29	2017/09/27	-44nT	37	6+	713.8km/sec	17.04nT	-16.58nT
30	2017/03/29	-42nT	20	4+	763.4km/sec	5.10nT	-4.68nT
31	2017/04/24	-42nT	19	4	795.8km/sec	6.21nT	-5.46nT
32	2017/11/21	-42nT	27	5	638.8km/sec	15.46nT	-13.64nT
33	2017/10/12	-41nT	26	5	596.2km/sec	9.96nT	-8.10nT
34	2017/03/30	-40nT	19	4+	729.8km/sec	6.50nT	-5.82nT
35	2017/05/20	-39nT	22	4+	748.9km/sec	14.34nT	-11.70nT
36	2017/04/20	-39nT	28	6-	657.0km/sec	12.62nT	-12.14nT
37	2017/05/29	-39nT	9	4	526.1km/sec	17.63nT	-13.40nT
38	2017/07/18	-39nT	6	3	743.1km/sec	10.96nT	-8.25nT
39	2017/08/27	-38nT	8	3	533.9km/sec	9.94nT	-9.26nT
40	2017/03/23	-38nT	9	4	-	-	-
41	2017/04/21	-38nT	17	5	690.9km/sec	14.00nT	-12.25nT
42	2017/09/10	-37nT	4	3	786.9km/sec	7.60nT	-5.68nT
43	2017/04/25	-37nT	10	3	713.9km/sec	5.57nT	-4.49nT
44	2017/03/04	-36nT	20	4+	786.1km/sec	5.35nT	-5.30nT
45	2017/10/11	-36nT	28	5-	530.4km/sec	12.76nT	-10.39nT
46	2017/08/19	-35nT	29	5-	813.7km/sec	7.58nT	-7.48nT
47	2017/02/03	-35nT	18	4+	710.8km/sec	5.30nT	-4.81nT
48	2017/09/13	-34nT	14	5+	629.6km/sec	11.53nT	-6.28nT
49	2017/12/05	-34nT	28	5	620.1km/sec	13.43nT	-10.48nT
50	2017/01/05	-34nT	17	4	823.2km/sec	12.12nT	-9.89nT

Latest news

Monday, 1 December 2025

X1.9 solar flare, Coronal hole faces Earth

Friday, 14 November 2025

X4.0 solar flare

Tuesday, 11 November 2025

X5.1 solar flare, G4 geomagnetic storm watch

More news

Latest forum messages

AR4294 / 4296 / 4298 291 Unspecified geomagnetic activity 39 Space Weather Memes 760 Current Farside Activity 233 AR 4299 23

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	2025/12/01	X1.9
Last M-flare	2025/12/04	M6.0
Last geomagnetic storm	2025/12/04	Kp5 (G1)

Spotless days
Last spotless day	2022/06/08

Monthly mean Sunspot Number
November 2025	91.8 -22.8
December 2025	186 +94.2
Last 30 days	106.3 +12.6

This day in history*

Solar flares
1	2006	X12.9
2	2006	M2.63
3	2024	M2.5
4	2014	M2.22
5	2023	M1.5

		Dst	G
1	1958	-176	G3
2	1959	-166	G4
3	1989	-79	G1
4	1977	-72	G1
5	1982	-55

*since 1994

Social networks

SpaceWeatherLive