1939Year 6 of solar cycle 17

Geomagnetic storms of 1939

1939 had 72 geomagnetic storms reaching Kp 5 or more, 19 of them strong (G3 or above); the strongest reached Kp 9−. Every storm with its dates, and the Kp of every day of the year.

72Every storm

19G3–G5

Kp 9−Peak Kp

103days at Kp 5 or more

The year day by day

the day's highest Kp

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Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Kp 0–3Kp 4Kp 5 · G1Kp 6 · G2Kp 7 · G3Kp 8 · G4Kp 9 · G5

Every storm · 1939

0Jan

4Feb

7Mar

8Apr

13May

6Jun

11Jul

5Aug

5Sep

7Oct

3Nov

3Dec

Date	Level	Peak Kp	Hours at Kp 5 or more	ap
2 February 1939	G1	Kp 5−	3	39
6 – 7 February 1939	G1	Kp 5+	21	56
11 February 1939	G1	Kp 5−	3	39
24 – 25 February 1939	G3	Kp 7+	27	154
1 – 2 March 1939	G2	Kp 6−	9	67
3 – 4 March 1939	G1	Kp 5	9	48
9 March 1939	G1	Kp 5	3	48
21 March 1939	G1	Kp 5	9	48
27 March 1939	G1	Kp 5+	6	56
28 – 29 March 1939	G3	Kp 7−	36	111
30 March 1939	G1	Kp 5+	6	56
1 April 1939	G1	Kp 5−	3	39
1 April 1939	G1	Kp 5−	3	39
4 April 1939	G1	Kp 5	3	48
10 – 12 April 1939	G1	Kp 5+	27	56
17 – 20 April 1939	G4	Kp 8	54	207
22 – 23 April 1939	G4	Kp 8−	21	179
24 – 25 April 1939	G4	Kp 9−	33	300
27 April 1939	G2	Kp 6	3	80
1 – 2 May 1939	G3	Kp 7−	27	111
3 May 1939	G1	Kp 5−	3	39
5 May 1939	G2	Kp 6	6	80
6 – 7 May 1939	G3	Kp 7−	24	111
8 May 1939	G2	Kp 6−	9	67
9 May 1939	G2	Kp 6−	3	67
16 May 1939	G1	Kp 5	6	48
20 May 1939	G1	Kp 5−	3	39
22 May 1939	G1	Kp 5+	12	56
23 – 24 May 1939	G1	Kp 5+	12	56
24 – 25 May 1939	G1	Kp 5	12	48
28 May 1939	G1	Kp 5+	3	56
29 May 1939	G1	Kp 5+	9	56
1 – 2 June 1939	G1	Kp 5−	6	39
14 June 1939	G3	Kp 7	15	132
16 June 1939	G3	Kp 7−	9	111
26 June 1939	G1	Kp 5−	3	39
27 June 1939	G1	Kp 5−	3	39
29 June 1939	G1	Kp 5	3	48
3 July 1939	G3	Kp 7−	12	111
4 – 6 July 1939	G3	Kp 7+	39	154
11 July 1939	G1	Kp 5−	3	39
12 July 1939	G1	Kp 5−	3	39
14 July 1939	G1	Kp 5+	12	56
16 July 1939	G1	Kp 5+	6	56
19 – 20 July 1939	G2	Kp 6	18	80
21 July 1939	G3	Kp 7+	6	154
22 July 1939	G1	Kp 5−	3	39
25 July 1939	G1	Kp 5−	3	39
26 July 1939	G2	Kp 6−	9	67
10 August 1939	G1	Kp 5−	3	39
11 – 13 August 1939	G4	Kp 8−	30	179
16 – 17 August 1939	G4	Kp 8−	18	179
19 August 1939	G1	Kp 5−	3	39
22 – 23 August 1939	G4	Kp 8−	39	179
2 – 3 September 1939	G2	Kp 6	15	80
9 September 1939	G1	Kp 5+	3	56
17 September 1939	G3	Kp 7	18	132
19 – 20 September 1939	G1	Kp 5+	18	56
26 September 1939	G1	Kp 5+	6	56
3 – 4 October 1939	G3	Kp 7+	18	154
6 October 1939	G2	Kp 6+	6	94
7 October 1939	G1	Kp 5−	3	39
9 October 1939	G3	Kp 7−	6	111
13 – 15 October 1939	G4	Kp 8	51	207
16 – 17 October 1939	G2	Kp 6−	21	67
18 – 19 October 1939	G1	Kp 5−	9	39
13 – 14 November 1939	G1	Kp 5+	18	56
25 November 1939	G1	Kp 5−	3	39
25 November 1939	G1	Kp 5	3	48
6 – 8 December 1939	G2	Kp 6	30	80
16 December 1939	G1	Kp 5−	3	39
22 December 1939	G1	Kp 5−	6	39