1991Year 5 of solar cycle 22

Geomagnetic storms of 1991

1991 had 84 geomagnetic storms reaching Kp 5 or more, 22 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.

84Every storm

22G3–G5

Kp 9−Peak Kp

141days 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 · 1991

3Jan

1Feb

10Mar

6Apr

8May

7Jun

9Jul

11Aug

4Sep

11Oct

9Nov

5Dec

Date	Level	Peak Kp	Hours at Kp 5 or more	ap
12 January 1991	G1	Kp 5	3	48
24 January 1991	G1	Kp 5−	3	39
25 January 1991	G1	Kp 5−	3	39
1 – 2 February 1991	G2	Kp 6−	9	67
5 March 1991	G1	Kp 5−	3	39
6 March 1991	G1	Kp 5	3	48
7 March 1991	G1	Kp 5−	3	39
9 – 10 March 1991	G2	Kp 6−	9	67
13 March 1991	G2	Kp 6+	6	94
21 March 1991	G3	Kp 7−	3	111
22 March 1991	G1	Kp 5−	3	39
24 – 26 March 1991	G4	Kp 9−	69	300
27 March 1991	G1	Kp 5−	6	39
30 March 1991	G1	Kp 5−	3	39
1 April 1991	G1	Kp 5−	6	39
3 April 1991	G1	Kp 5+	12	56
4 April 1991	G3	Kp 7−	15	111
25 April 1991	G1	Kp 5−	3	39
27 April 1991	G1	Kp 5+	3	56
28 April – 1 May 1991	G3	Kp 7−	45	111
1 – 2 May 1991	G2	Kp 6	15	80
13 – 14 May 1991	G2	Kp 6−	21	67
16 – 17 May 1991	G2	Kp 6	12	80
23 – 25 May 1991	G2	Kp 6−	21	67
26 May 1991	G1	Kp 5−	3	39
28 May 1991	G1	Kp 5	3	48
28 – 29 May 1991	G1	Kp 5+	12	56
31 May – 2 June 1991	G3	Kp 7+	42	154
4 – 6 June 1991	G4	Kp 9−	48	300
7 June 1991	G1	Kp 5+	3	56
7 June 1991	G1	Kp 5−	3	39
8 – 13 June 1991	G4	Kp 8−	102	179
17 – 18 June 1991	G3	Kp 7+	18	154
21 June 1991	G1	Kp 5−	3	39
23 – 24 June 1991	G2	Kp 6	21	80
3 – 4 July 1991	G1	Kp 5−	9	39
8 – 10 July 1991	G4	Kp 8	36	207
11 July 1991	G1	Kp 5	3	48
12 – 14 July 1991	G4	Kp 9−	48	300
16 – 17 July 1991	G2	Kp 6−	15	67
17 – 18 July 1991	G1	Kp 5+	6	56
19 – 20 July 1991	G2	Kp 6+	12	94
21 July 1991	G2	Kp 6−	3	67
22 July 1991	G1	Kp 5−	3	39
1 – 5 August 1991	G2	Kp 6+	54	94
5 – 6 August 1991	G2	Kp 6	9	80
7 August 1991	G1	Kp 5+	3	56
11 August 1991	G1	Kp 5−	3	39
12 August 1991	G3	Kp 7+	15	154
14 – 15 August 1991	G1	Kp 5+	15	56
18 – 19 August 1991	G4	Kp 8−	21	179
20 – 21 August 1991	G4	Kp 8−	30	179
22 August 1991	G3	Kp 7	9	132
27 August 1991	G3	Kp 7−	9	111
30 August – 2 September 1991	G2	Kp 6+	48	94
5 September 1991	G1	Kp 5−	3	39
8 September 1991	G1	Kp 5	3	48
9 – 10 September 1991	G3	Kp 7	24	132
25 – 28 September 1991	G2	Kp 6+	66	94
1 – 2 October 1991	G3	Kp 7+	27	154
4 October 1991	G2	Kp 6	6	80
6 – 7 October 1991	G2	Kp 6−	12	67
8 October 1991	G3	Kp 7−	12	111
10 October 1991	G1	Kp 5+	9	56
20 October 1991	G1	Kp 5−	3	39
21 October 1991	G1	Kp 5	6	48
23 – 24 October 1991	G1	Kp 5+	9	56
25 October 1991	G1	Kp 5+	15	56
26 – 29 October 1991	G4	Kp 8+	69	236
30 October – 2 November 1991	G4	Kp 8+	60	236
4 – 5 November 1991	G2	Kp 6	15	80
6 November 1991	G1	Kp 5	3	48
8 – 9 November 1991	G4	Kp 9−	33	300
11 November 1991	G1	Kp 5	6	48
15 November 1991	G1	Kp 5	6	48
17 November 1991	G1	Kp 5−	3	39
18 – 19 November 1991	G2	Kp 6+	27	94
21 – 22 November 1991	G3	Kp 7−	36	111
23 November 1991	G1	Kp 5	9	48
16 – 17 December 1991	G1	Kp 5+	9	56
21 December 1991	G1	Kp 5−	6	39
27 December 1991	G2	Kp 6+	12	94
28 – 29 December 1991	G1	Kp 5−	9	39
29 – 30 December 1991	G1	Kp 5+	6	56