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Geomagnetic storm on 1 Oct 1991 (G3)

Max Kp7+G3

Ap54No. 32 in 1991

Consecutive G1+ days2

Ap rank774since 1932

Kp by 3-hour slot (UTC)

00–033+

03–064-

06–095o

09–123+

12–154-

15–183+

18–217o

21–247+

The days around it

Date	Max Kp	Ap	Level
28 Sep 1991	6-	40	G2
29 Sep 1991	4o	18	–
30 Sep 1991	4+	24	–
1 Oct 1991	7+	54	G3
2 Oct 1991	6+	67	G2
3 Oct 1991	4o	19	–
4 Oct 1991	6o	35	G2

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.

← 9 Sep 1991 8 Oct 1991 →

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Max Kp 7+, Ap 54: No. 774 of 34,615 days since 1932 by Ap.