1947Year 4 of solar cycle 18

Geomagnetic storms of 1947

1947 had 65 geomagnetic storms reaching Kp 5 or more, 15 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.

65Every storm

15G3–G5

Kp 9−Peak Kp

111days 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 · 1947

5Jan

4Feb

12Mar

4Apr

6May

6Jun

3Jul

4Aug

7Sep

7Oct

3Nov

4Dec

Date	Level	Peak Kp	Hours at Kp 5 or more	ap
4 January 1947	G1	Kp 5−	3	39
5 January 1947	G1	Kp 5−	3	39
16 January 1947	G2	Kp 6+	9	94
24 January 1947	G2	Kp 6−	3	67
25 – 26 January 1947	G2	Kp 6+	27	94
8 – 9 February 1947	G1	Kp 5	6	48
9 February 1947	G1	Kp 5−	3	39
16 – 17 February 1947	G2	Kp 6+	21	94
19 – 20 February 1947	G1	Kp 5	9	48
2 – 4 March 1947	G4	Kp 8+	57	236
7 March 1947	G1	Kp 5−	3	39
8 – 9 March 1947	G4	Kp 8−	30	179
12 March 1947	G1	Kp 5−	3	39
14 March 1947	G1	Kp 5+	3	56
15 March 1947	G3	Kp 7+	12	154
16 – 17 March 1947	G1	Kp 5+	12	56
22 March 1947	G1	Kp 5	6	48
23 – 24 March 1947	G2	Kp 6+	18	94
26 March 1947	G1	Kp 5−	3	39
27 – 28 March 1947	G3	Kp 7−	33	111
29 – 30 March 1947	G2	Kp 6−	12	67
8 – 9 April 1947	G2	Kp 6−	12	67
17 – 19 April 1947	G4	Kp 9−	30	300
20 April 1947	G1	Kp 5	9	48
25 April 1947	G1	Kp 5−	3	39
13 May 1947	G1	Kp 5−	3	39
15 – 16 May 1947	G1	Kp 5	21	48
22 – 23 May 1947	G2	Kp 6−	9	67
24 May 1947	G4	Kp 8−	6	179
28 May 1947	G1	Kp 5	6	48
29 May 1947	G1	Kp 5	6	48
1 June 1947	G2	Kp 6−	6	67
5 – 6 June 1947	G2	Kp 6	12	80
7 – 8 June 1947	G1	Kp 5	6	48
13 – 14 June 1947	G3	Kp 7	21	132
17 June 1947	G2	Kp 6	15	80
25 June 1947	G1	Kp 5−	6	39
17 – 19 July 1947	G4	Kp 8	39	207
20 July 1947	G1	Kp 5+	9	56
27 July 1947	G1	Kp 5−	3	39
12 August 1947	G1	Kp 5	9	48
13 – 14 August 1947	G1	Kp 5+	9	56
15 – 23 August 1947	G4	Kp 8+	153	236
25 August 1947	G1	Kp 5+	3	56
3 – 4 September 1947	G3	Kp 7+	30	154
6 – 8 September 1947	G3	Kp 7−	24	111
11 September 1947	G1	Kp 5	3	48
13 – 15 September 1947	G2	Kp 6+	63	94
16 – 18 September 1947	G2	Kp 6	45	80
22 – 23 September 1947	G2	Kp 6+	24	94
24 – 25 September 1947	G4	Kp 8−	42	179
1 – 3 October 1947	G3	Kp 7−	42	111
7 October 1947	G1	Kp 5−	3	39
9 – 12 October 1947	G2	Kp 6	75	80
13 – 15 October 1947	G2	Kp 6	33	80
16 October 1947	G1	Kp 5	3	48
19 October 1947	G2	Kp 6+	3	94
20 October 1947	G1	Kp 5−	3	39
9 – 10 November 1947	G3	Kp 7	18	132
10 – 12 November 1947	G3	Kp 7−	24	111
24 November 1947	G1	Kp 5+	3	56
1 December 1947	G1	Kp 5−	3	39
6 December 1947	G1	Kp 5−	3	39
6 December 1947	G1	Kp 5−	3	39
9 December 1947	G1	Kp 5−	3	39