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.

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May 2017

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1

B9.9
Kp2+

2

B1.3
Kp2

3

Kp1+

4

Kp3+

5

B4.7
Kp3-

6

B3.5
Kp2-

7

Kp3

8

Kp2

9

Kp2

10

Kp3-

11

Kp3-

12

Kp3

13

Kp1+

14

Kp3

15

Kp4-

16

B2.2
Kp3-

17

Kp2+

18

B1.1
Kp4-

19

Kp4-

20

Kp4+

21

B1.4
Kp3-

22

B1.5
Kp3

23

B4.4
Kp3

24

B3.8
Kp1+

25

B5.0
Kp1

26

B2.9
Kp1

27

B9.2
G2

28

C3.3
G3

29

B6.8
Kp4

30

B6.8
Kp3+

31

C2.0
Kp1+
    
       

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Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2020/04/20Kp5 (G1)
Number of spotless days in 2020:121
Current stretch spotless days:29

This day in history*

Solar flares
12003X1.2
21998M6.7
32003M2.8
41999M1.6
52003M1.5
ApG
12003109G4
2199441G1
3201134G1
4201028G1
5199826G3
*since 1994

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