1998Year 2 of solar cycle 23

Geomagnetic storms of 1998

1998 had 41 geomagnetic storms reaching Kp 5 or more, 11 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.

41Every storm

11G3–G5

Kp 9−Peak Kp

54days 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 · 1998

1Jan

2Feb

6Mar

2Apr

4May

3Jun

5Jul

4Aug

3Sep

6Oct

3Nov

2Dec

Date	Level	Peak Kp	Hours at Kp 5 or more	ap
7 January 1998	G2	Kp 6+	6	94
17 – 18 February 1998	G3	Kp 7−	9	111
28 February 1998	G1	Kp 5	3	48
10 – 11 March 1998	G3	Kp 7+	15	154
15 March 1998	G1	Kp 5	6	48
21 March 1998	G2	Kp 6+	9	94
25 March 1998	G1	Kp 5−	3	39
29 March 1998	G1	Kp 5−	3	39
29 March 1998	G1	Kp 5−	3	39
23 – 25 April 1998	G2	Kp 6−	21	67
25 – 26 April 1998	G1	Kp 5	15	48
2 – 4 May 1998	G4	Kp 9−	57	300
5 May 1998	G3	Kp 7−	12	111
17 May 1998	G1	Kp 5	3	48
29 – 30 May 1998	G3	Kp 7−	6	111
10 June 1998	G1	Kp 5−	3	39
20 June 1998	G1	Kp 5−	3	39
26 June 1998	G2	Kp 6+	9	94
6 July 1998	G1	Kp 5	3	48
16 July 1998	G2	Kp 6	9	80
23 July 1998	G1	Kp 5+	15	56
24 July 1998	G1	Kp 5	6	48
30 – 31 July 1998	G1	Kp 5	12	48
1 August 1998	G2	Kp 6−	3	67
6 – 7 August 1998	G3	Kp 7+	15	154
26 – 28 August 1998	G4	Kp 8	48	207
29 August 1998	G1	Kp 5+	3	56
18 September 1998	G1	Kp 5+	6	56
24 September 1998	G1	Kp 5−	3	39
24 – 25 September 1998	G4	Kp 8+	21	236
1 October 1998	G1	Kp 5+	3	56
2 October 1998	G1	Kp 5+	12	56
7 October 1998	G2	Kp 6−	6	67
19 October 1998	G3	Kp 7−	18	111
20 – 21 October 1998	G1	Kp 5	9	48
27 October 1998	G1	Kp 5−	3	39
7 – 8 November 1998	G4	Kp 8−	18	179
9 November 1998	G3	Kp 7−	24	111
13 – 14 November 1998	G2	Kp 6	33	80
11 December 1998	G1	Kp 5+	12	56
29 December 1998	G1	Kp 5	3	48