1990Year 4 of solar cycle 22

Geomagnetic storms of 1990

1990 had 72 geomagnetic storms reaching Kp 5 or more, 12 of them strong (G3 or above); the strongest reached Kp 8+. Every storm with its dates, and the Kp of every day of the year.

72Every storm

12G3–G5

Kp 8+Peak Kp

104days 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 · 1990

5Jan

12Feb

10Mar

8Apr

7May

4Jun

3Jul

8Aug

6Sep

7Oct

2Nov

0Dec

Date	Level	Peak Kp	Hours at Kp 5 or more	ap
3 January 1990	G1	Kp 5	3	48
24 January 1990	G1	Kp 5	3	48
24 – 25 January 1990	G1	Kp 5	9	48
29 January 1990	G1	Kp 5−	3	39
30 January 1990	G1	Kp 5	3	48
1 – 2 February 1990	G1	Kp 5	9	48
4 – 5 February 1990	G1	Kp 5+	15	56
7 February 1990	G1	Kp 5	3	48
14 February 1990	G2	Kp 6+	9	94
15 – 16 February 1990	G3	Kp 7−	15	111
16 – 17 February 1990	G2	Kp 6	9	80
18 – 20 February 1990	G1	Kp 5+	33	56
22 – 24 February 1990	G1	Kp 5+	24	56
25 February 1990	G1	Kp 5	3	48
25 February 1990	G1	Kp 5−	3	39
27 February 1990	G1	Kp 5	6	48
28 February 1990	G2	Kp 6	6	80
6 March 1990	G1	Kp 5	3	48
12 – 13 March 1990	G3	Kp 7+	12	154
14 March 1990	G1	Kp 5+	6	56
18 – 19 March 1990	G2	Kp 6−	15	67
20 – 21 March 1990	G3	Kp 7+	24	154
22 March 1990	G1	Kp 5−	3	39
23 March 1990	G1	Kp 5−	6	39
25 – 27 March 1990	G2	Kp 6	27	80
27 March 1990	G1	Kp 5+	9	56
29 – 30 March 1990	G4	Kp 8	24	207
9 – 15 April 1990	G4	Kp 8	105	207
17 – 18 April 1990	G2	Kp 6	18	80
20 – 21 April 1990	G1	Kp 5	6	48
22 – 23 April 1990	G2	Kp 6−	12	67
24 April 1990	G2	Kp 6	6	80
26 April 1990	G1	Kp 5+	3	56
29 April 1990	G1	Kp 5−	6	39
29 – 30 April 1990	G2	Kp 6−	6	67
10 May 1990	G2	Kp 6−	9	67
11 May 1990	G1	Kp 5+	3	56
18 May 1990	G2	Kp 6+	6	94
20 May 1990	G1	Kp 5−	3	39
21 – 22 May 1990	G1	Kp 5+	9	56
26 – 27 May 1990	G3	Kp 7+	18	154
30 May 1990	G1	Kp 5	3	48
7 June 1990	G1	Kp 5+	3	56
9 – 10 June 1990	G2	Kp 6−	12	67
12 – 14 June 1990	G4	Kp 8+	48	236
27 June 1990	G1	Kp 5−	3	39
19 July 1990	G1	Kp 5−	3	39
26 July 1990	G1	Kp 5+	3	56
28 – 29 July 1990	G4	Kp 8−	39	179
1 August 1990	G1	Kp 5	9	48
14 August 1990	G1	Kp 5+	3	56
15 August 1990	G1	Kp 5	12	48
16 August 1990	G1	Kp 5−	3	39
20 August 1990	G1	Kp 5−	3	39
21 – 24 August 1990	G3	Kp 7	54	132
26 August 1990	G3	Kp 7−	15	111
30 – 31 August 1990	G1	Kp 5+	9	56
1 September 1990	G3	Kp 7−	3	111
11 September 1990	G1	Kp 5−	3	39
13 September 1990	G1	Kp 5−	3	39
15 September 1990	G1	Kp 5−	3	39
16 September 1990	G1	Kp 5	3	48
20 September 1990	G1	Kp 5+	3	56
4 October 1990	G1	Kp 5−	3	39
10 – 12 October 1990	G2	Kp 6	36	80
15 October 1990	G1	Kp 5−	6	39
20 October 1990	G1	Kp 5	6	48
24 October 1990	G1	Kp 5	3	48
30 October 1990	G2	Kp 6−	6	67
31 October 1990	G1	Kp 5−	3	39
27 November 1990	G1	Kp 5−	3	39
27 – 28 November 1990	G3	Kp 7−	9	111