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Geomagnetic storm on 21 Mar 1991 (G3)

Max Kp7-G3

Ap26No. 99 in 1991

Consecutive G1+ days2

Ap rank3,988since 1932

Kp by 3-hour slot (UTC)

00–031o

03–062o

06–093o

09–123+

12–157-

15–184o

18–213-

21–243+

The days around it

Date	Max Kp	Ap	Level
18 Mar 1991	4o	9	–
19 Mar 1991	4o	12	–
20 Mar 1991	4-	12	–
21 Mar 1991	7-	26	G3
22 Mar 1991	5-	20	G1
23 Mar 1991	4-	11	–
24 Mar 1991	9-	161	G5

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.

← 27 Nov 1990 24 Mar 1991 →

About this page

Max Kp 7-, Ap 26: No. 3,988 of 34,615 days since 1932 by Ap.