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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September 2017

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1

C2.0
Kp4

2

C7.7
G1

3

C1.1
Kp3-

4

M5.5
G1

5

M4.2
Kp4

6

X9.3
Kp3+

7

X1.3
G4

8

M8.1
G4

9

M3.7
Kp2+

10

X8.2
Kp3

11

B9.8
Kp3+

12

C3.0
G1

13

B1.4
G1

14

G1

15

G2

16

G1

17

Kp4

18

Kp4+

19

Kp3-

20

B8.4
Kp3+

21

Kp2+

22

Kp2+

23

B3.0
Kp2+

24

B2.8
Kp3-

25

B5.9
Kp2+

26

C1.8
Kp2

27

C1.7
G2

28

B2.9
G3

29

B2.5
Kp3+

30

B3.5
Kp4
 
       

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Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/10/26Kp5 (G1)
Number of spotless days in 2019:270
Current stretch spotless days:43

This day in history*

Solar flares
12001C9.4
22001C8.3
32014C7.0
42001C6.5
52002C5.9
ApG
1200694G4
2200325G1
3199421G1
4201516G1
5201414
*since 1994

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