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Geomagnetic storm on 23 May 2002 (G4)

Max Kp8+G4

Ap78No. 1 in 2002

Consecutive G1+ days1

Ap rank330since 1932

Kp by 3-hour slot (UTC)

00–033-

03–063-

06–092o

09–127-

12–158-

15–188+

18–215o

21–243+

The days around it

Date	Max Kp	Ap	Level
20 May 2002	3+	10	–
21 May 2002	4-	10	–
22 May 2002	3-	8	–
23 May 2002	8+	78	G4
24 May 2002	1-	2	–
25 May 2002	2o	4	–
26 May 2002	3o	7	–

Highest-Ap days of 2002

23 May 200278

20 Apr 200270

1 Oct 200267

4 Oct 200264

18 Apr 200263

24 Oct 200263

17 Apr 200262

19 Apr 200262

7 Sep 200257

2 Oct 200253

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 May 2002 7 Sep 2002 →

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Max Kp 8+, Ap 78: No. 330 of 34,615 days since 1932 by Ap.