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Geomagnetic storm on 31 May 1991 (G3)

Max Kp7-G3

Ap52No. 33 in 1991

Consecutive G1+ days3

Ap rank841since 1932

Kp by 3-hour slot (UTC)

00–033o

03–064-

06–094o

09–126+

12–156+

15–187-

18–215-

21–243o

The days around it

Date	Max Kp	Ap	Level
28 May 1991	5o	31	G1
29 May 1991	5+	22	G1
30 May 1991	3+	12	–
31 May 1991	7-	52	G3
1 Jun 1991	7+	74	G3
2 Jun 1991	7o	60	G3
3 Jun 1991	4+	16	–

Highest-Ap days of 1991

5 Jun 1991196

24 Mar 1991161

13 Jul 1991134

25 Mar 1991130

29 Oct 1991128

13 Jun 1991120

10 Jun 1991119

9 Nov 1991119

9 Jul 1991117

26 Mar 1991114

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.

← 29 Apr 1991 1 Jun 1991 →

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Max Kp 7-, Ap 52: No. 841 of 34,615 days since 1932 by Ap.