1987Year 1 of solar cycle 22

Geomagnetic storms of 1987

1987 had 43 geomagnetic storms reaching Kp 5 or more, 1 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.

43Every storm

1G3–G5

Kp 7Peak Kp

56days at Kp 5 or more

The year day by day

the day's highest Kp

12345678910111213141516171819202122232425262728293031

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 · 1987

1Jan

2Feb

2Mar

1Apr

2May

1Jun

3Jul

7Aug

7Sep

7Oct

8Nov

2Dec

Date	Level	Peak Kp	Hours at Kp 5 or more	ap
29 January 1987	G1	Kp 5−	3	39
20 February 1987	G1	Kp 5	6	48
21 February 1987	G1	Kp 5−	3	39
7 March 1987	G1	Kp 5−	3	39
27 March 1987	G1	Kp 5−	6	39
4 April 1987	G1	Kp 5−	3	39
24 – 25 May 1987	G2	Kp 6−	6	67
29 May 1987	G1	Kp 5−	6	39
6 June 1987	G1	Kp 5	6	48
15 July 1987	G1	Kp 5−	6	39
28 – 29 July 1987	G3	Kp 7	21	132
31 July 1987	G1	Kp 5	3	48
3 August 1987	G1	Kp 5−	3	39
13 August 1987	G2	Kp 6−	3	67
25 – 26 August 1987	G2	Kp 6	27	80
27 August 1987	G1	Kp 5−	3	39
28 August 1987	G1	Kp 5−	3	39
30 August 1987	G1	Kp 5−	3	39
31 August – 1 September 1987	G2	Kp 6−	21	67
10 – 11 September 1987	G2	Kp 6+	24	94
13 – 14 September 1987	G1	Kp 5	12	48
15 – 16 September 1987	G1	Kp 5	6	48
22 – 23 September 1987	G2	Kp 6+	9	94
25 – 26 September 1987	G2	Kp 6	18	80
28 September 1987	G1	Kp 5	3	48
29 – 30 September 1987	G2	Kp 6	18	80
3 October 1987	G2	Kp 6	12	80
11 October 1987	G2	Kp 6−	6	67
13 October 1987	G1	Kp 5−	3	39
14 – 15 October 1987	G2	Kp 6−	9	67
17 October 1987	G1	Kp 5−	3	39
24 – 25 October 1987	G1	Kp 5+	15	56
27 – 28 October 1987	G2	Kp 6−	30	67
2 November 1987	G1	Kp 5+	6	56
3 November 1987	G1	Kp 5+	6	56
9 November 1987	G1	Kp 5−	3	39
12 November 1987	G1	Kp 5	3	48
13 November 1987	G1	Kp 5−	6	39
23 November 1987	G1	Kp 5+	12	56
24 November 1987	G1	Kp 5−	3	39
27 November 1987	G1	Kp 5−	3	39
10 December 1987	G1	Kp 5+	6	56
16 December 1987	G2	Kp 6−	15	67