The aurora and solar activity archive

Searching for historical solar and auroral activity data? The archive is filled with data between the year 1996 and yesterday. You can choose a viewing mode to quickly look for days with interesting space weather and pick a day to view the archived data for that day with more detailed space weather data.

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April 2001

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1

M7.89
Kp6-

2

X28.57+
Kp5-
S1

3

X1.77
Kp3-
S3

4

M2.91
Kp5+
S2

5

X1.21
Kp4+
S1

6

X8.08
Kp3+
S1

7

C3.3
Kp5-
S1

8

Kp7

9

X1.14
Kp5

10

X3.14
Kp3+
S2

11

M3.41
Kp8+
S2

12

X2.9
Kp7+
S2

13

C1.36
Kp7+
S1

14

M1.47
Kp4+

15

X20.67+
Kp4+
S2

16

M1.68
Kp3+
S2

17

M1.97
Kp2+
S1

18

C3.18
Kp7+
S2

19

M2.91
Kp3-
S1

20

M5.99
Kp3-
S1

21

C6.89
Kp3+

22

M4.66
Kp6+

23

M5.77
Kp4+

24

M4.48
Kp2+

25

M3.98
Kp2+

26

X1.13
Kp3-

27

M1.81
Kp1+

28

M1.01
Kp6
S1

29

C4.58
Kp4+

30

C7.31
Kp1
      
Currently there's no noteworthy space weather

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Space weather facts

Last X-flare2025/03/28X1.1
Last M-flare2025/04/22M1.3
Last geomagnetic storm2025/04/21Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
March 2025134.2 -20.4
April 2025121 -13.2
Last 30 days113 -27.2

This day in history*

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