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 2006

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1

C1.13
Kp1-

2

B9.58
Kp1

3

C5.78
Kp1-

4

C1.01
Kp3+

5

M1.16
Kp5+

6

M2.02
Kp4-

7

M1.39
Kp1

8

B4.84
Kp2-

9

B3.83
Kp6

10

C1.24
Kp4

11

C3.41
Kp2+

12

Kp0+

13

B2.76
Kp4

14

Kp7

15

B1.71
Kp5

16

B2.31
Kp4-

17

B2.95
Kp3+

18

Kp4

19

B1.91
Kp2-

20

B3.21
Kp3

21

B6.52
Kp4

22

C3.83
Kp5-

23

C1.05
Kp3

24

C1.5
Kp3-

25

C1.88
Kp3-

26

M1.9
Kp2-

27

X1.13
Kp1+

28

C3.31
Kp4-

29

C3.4
Kp1-

30

C7.69
Kp0
       
The solar wind speed is currently moderately high (630.9 km/sec.)

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Minor R1 radio blackout in progress (≥M1 - current: M1.03)


Monday, 21 April 2025
20:45 UTC - Geomagnetic activity

Minor G1 geomagnetic storm (Kp5) Threshold Reached: 20:33 UTC

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Moderate M1.99 flare

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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 2025120 -14.2
Last 30 days111.9 -31

This day in history*

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