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Geomagnetic storm on 12 Apr 2001 (G3)

Max Kp7+G3

Ap50No. 11 in 2001

Consecutive G1+ days3

Ap rank940since 1932

Kp by 3-hour slot (UTC)

00–037+

03–066+

06–095+

09–125o

12–154-

15–183o

18–211-

21–241o

The days around it

Date	Max Kp	Ap	Level
9 Apr 2001	5o	20	G1
10 Apr 2001	3+	11	–
11 Apr 2001	8+	85	G4
12 Apr 2001	7+	50	G3
13 Apr 2001	7+	50	G3
14 Apr 2001	4+	18	–
15 Apr 2001	4+	13	–

Highest-Ap days of 2001

31 Mar 2001192

6 Nov 2001142

24 Nov 2001104

22 Oct 200196

11 Apr 200185

20 Mar 200174

3 Oct 200169

8 Apr 200163

21 Oct 200157

2 Oct 200152

Dates and time slots are UTC. Kp is the 3-hourly planetary geomagnetic index (0–9); Ap is the daily average disturbance. G1–G5 follow the NOAA storm scale (Kp 5- and above counted as G1). Aurora visibility also depends on weather and location. The latest values are preliminary.

← 11 Apr 2001 13 Apr 2001 →

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Max Kp 7+, Ap 50: No. 940 of 34,615 days since 1932 by Ap.