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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 2002

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1

C4.79
Kp4+

2

M1.35
Kp4+

3

C4.6
Kp4

4

M8.82
Kp2

5

C7.08
Kp1+

6

M1.37
Kp1+

7

M1.38
Kp3

8

C8.84
Kp1-

9

M3.12
Kp1

10

X1.17
Kp3-

11

M1.42
Kp4

12

M5.79
Kp4+

13

C5.15
Kp4-

14

M2.07
Kp4+

15

M5.32
Kp2+

16

M3.66
Kp3-

17

M3.79
Kp7+
S1

18

M1.35
Kp7
S1

19

C4.88
Kp7-

20

C5.91
Kp7+

21

X2.2
Kp2+
S3

22

M1.1
Kp4
S3

23

C2.67
Kp6
S2

24

M2.5
Kp3+
S2

25

C4.11
Kp2
S1

26

C3.01
Kp1+
S1

27

C5.84
Kp3+

28

C1.97
Kp5-

29

C6.87
Kp3

30

M1.95
Kp3-
     
       
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Space weather facts

Last X-flare2026/03/30X1.5
Last M-flare2026/04/04M1.0
Last geomagnetic storm2026/04/03Kp7- (G3)
Spotless days
Last 365 days3 days
20263 days (3%)
Last spotless day2026/02/24
Monthly mean Sunspot Number
March 202685.9 +7.7
April 2026128.3 +42.3
Last 30 days97.5 +35.7

This day in history*

Solar flares
12001X1.21
22001M7.3
32001M4.52
42013M3.28
52004M2.47
DstG
11993-165G3
21968-112G3
31978-109G1
41984-108G2
51989-101G2
*since 1994

Aurora on this day in history

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