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Geomagnetic storm on 27 Aug 1991 (G3)

Max Kp7-G3

Ap37No. 58 in 1991

Consecutive G1+ days1

Ap rank1,904since 1932

Kp by 3-hour slot (UTC)

00–033o

03–063o

06–093o

09–122o

12–152+

15–186-

18–217-

21–245+

The days around it

Date	Max Kp	Ap	Level
24 Aug 1991	3+	11	–
25 Aug 1991	3+	10	–
26 Aug 1991	3-	8	–
27 Aug 1991	7-	37	G3
28 Aug 1991	4o	16	–
29 Aug 1991	4+	14	–
30 Aug 1991	6+	49	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.

← 22 Aug 1991 9 Sep 1991 →

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Max Kp 7-, Ap 37: No. 1,904 of 34,615 days since 1932 by Ap.