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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
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Last X-flare2024/11/06X2.39
Last M-flare2024/11/20M1.1
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Last spotless day2022/06/08
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This day in history*

Solar flares
12012M5.08
21999M4.93
31999M3.27
42000M2.33
52012M2.11
DstG
12003-309G3
21991-135G3
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*since 1994

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