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Geomagnetic storm on 9 Nov 1991 (G4)

Max Kp8+G4

Ap119No. 8 in 1991

Consecutive G1+ days2

Ap rank104since 1932

Kp by 3-hour slot (UTC)

00–038+

03–068+

06–097+

09–127-

12–156o

15–185o

18–215+

21–244+

The days around it

Date	Max Kp	Ap	Level
6 Nov 1991	5o	18	G1
7 Nov 1991	3+	12	–
8 Nov 1991	9-	98	G5
9 Nov 1991	8+	119	G4
10 Nov 1991	4o	22	–
11 Nov 1991	5o	20	G1
12 Nov 1991	4-	10	–

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.

← 8 Nov 1991 21 Nov 1991 →

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Max Kp 8+, Ap 119: No. 104 of 34,615 days since 1932 by Ap.