Top Solar Radiation Storms Help

On this page you will find an overview of the strongest solar radiation storms since 1976 together with links to more information in our archive.

S-scale Peak intensity
11991/03/23S4 - Severe43000
21989/10/19S4 - Severe40000
32003/10/29S4 - Severe33700
42001/11/06S4 - Severe31700
52001/11/05S4 - Severe24300
62000/07/15S4 - Severe24000
72001/11/24S4 - Severe18900
82000/11/09S4 - Severe14800
92001/09/25S4 - Severe12900
101994/02/20S4 - Severe10000
111989/08/12S3 - Strong9200
122000/07/14S3 - Strong8380
132003/10/28S3 - Strong7730
141989/11/30S3 - Strong7300
152001/09/26S3 - Strong7100
162012/03/08S3 - Strong6529.8
172012/01/24S3 - Strong6314.1
182005/01/17S3 - Strong5040
192001/11/23S3 - Strong4800
201982/05/09S3 - Strong4600
211989/09/29S3 - Strong4500
222000/11/10S3 - Strong4480
232003/10/30S3 - Strong3850
242012/01/23S3 - Strong3626.7
251989/03/08S3 - Strong3500

Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future

Whitehorse, YT, Yellowknife, NT
Anchorage, AK, Fairbanks, AK, Juneau, AK, Utqiagvik, AK
The density of the solar wind is moderate (29.84 p/cm3)
The strength of the interplanetary magnetic field is moderate (19.73nT), the direction is slightly South (-8.68nT).
The maximum X-ray flux of the past two hours is:
C6.55

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Minor G1 geomagnetic storm (Kp5) Threshold Reached: 02:59 UTC

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Tuesday, 25 March 2025
20:45 UTC - Geomagnetic activity

Active geomagnetic conditions (Kp4) Threshold Reached: 20:19 UTC

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Last geomagnetic storm2025/03/22Kp6- (G2)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
February 2025154.6 +17.6
March 2025135 -19.6
Last 30 days133.7 -19.9

This day in history*

Solar flares
12001M3.86
22000M3.34
32001M3.14
41998M2.37
52024M1.9
DstG
11976-226G4
21991-168G4
31988-154G3
41959-132G4
51990-111G2
*since 1994

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