1977Year 2 of solar cycle 21

Geomagnetic storms of 1977

1977 had 49 geomagnetic storms reaching Kp 5 or more, 5 of them strong (G3 or above); the strongest reached Kp 7+. Every storm with its dates, and the Kp of every day of the year.

49Every storm

5G3–G5

Kp 7+Peak Kp

66days 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 · 1977

4Jan

2Feb

4Mar

5Apr

4May

0Jun

5Jul

7Aug

4Sep

5Oct

4Nov

5Dec

Date	Level	Peak Kp	Hours at Kp 5 or more	ap
11 January 1977	G1	Kp 5	3	48
28 – 29 January 1977	G1	Kp 5+	6	56
30 January 1977	G1	Kp 5−	3	39
30 – 31 January 1977	G1	Kp 5+	6	56
18 February 1977	G1	Kp 5+	3	56
24 February 1977	G1	Kp 5	3	48
8 – 9 March 1977	G1	Kp 5+	15	56
11 March 1977	G1	Kp 5−	3	39
26 March 1977	G1	Kp 5	3	48
29 March 1977	G1	Kp 5−	3	39
4 April 1977	G1	Kp 5+	3	56
6 – 7 April 1977	G3	Kp 7	21	132
8 April 1977	G1	Kp 5−	3	39
19 – 20 April 1977	G2	Kp 6+	21	94
25 April 1977	G2	Kp 6−	6	67
2 – 3 May 1977	G2	Kp 6+	24	94
4 May 1977	G1	Kp 5+	6	56
11 – 12 May 1977	G2	Kp 6−	9	67
17 May 1977	G1	Kp 5−	3	39
6 – 7 July 1977	G2	Kp 6−	12	67
14 July 1977	G1	Kp 5−	6	39
16 July 1977	G1	Kp 5	6	48
20 July 1977	G1	Kp 5	6	48
29 July 1977	G3	Kp 7−	15	111
5 August 1977	G2	Kp 6	12	80
9 August 1977	G1	Kp 5−	3	39
11 August 1977	G1	Kp 5	3	48
17 August 1977	G2	Kp 6−	6	67
19 August 1977	G1	Kp 5	6	48
19 August 1977	G1	Kp 5−	3	39
25 August 1977	G1	Kp 5+	9	56
13 September 1977	G1	Kp 5+	6	56
19 – 22 September 1977	G3	Kp 7+	60	154
23 September 1977	G1	Kp 5	3	48
26 – 27 September 1977	G2	Kp 6−	9	67
11 – 12 October 1977	G1	Kp 5	12	48
14 – 15 October 1977	G1	Kp 5−	6	39
18 – 19 October 1977	G2	Kp 6	9	80
22 October 1977	G1	Kp 5	3	48
27 – 28 October 1977	G3	Kp 7+	24	154
13 November 1977	G1	Kp 5	3	48
14 – 15 November 1977	G2	Kp 6−	18	67
25 – 26 November 1977	G1	Kp 5+	6	56
27 November 1977	G1	Kp 5	3	48
2 December 1977	G3	Kp 7	18	132
4 – 5 December 1977	G1	Kp 5−	9	39
11 December 1977	G1	Kp 5+	12	56
12 December 1977	G2	Kp 6−	3	67
17 December 1977	G1	Kp 5	3	48