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Geomagnetic storm on 13 Jul 1940 (G4)

Max Kp8-G4

Ap58No. 12 in 1940

Consecutive G1+ days2

Ap rank647since 1932

Kp by 3-hour slot (UTC)

00–031+

03–062-

06–093-

09–127-

12–158-

15–186o

18–215-

21–244+

The days around it

Date	Max Kp	Ap	Level
10 Jul 1940	5o	28	G1
11 Jul 1940	4-	9	–
12 Jul 1940	2+	5	–
13 Jul 1940	8-	58	G4
14 Jul 1940	5-	20	G1
15 Jul 1940	3+	14	–
16 Jul 1940	3-	8	–

Highest-Ap days of 1940

30 Mar 1940189

24 Mar 1940187

25 Mar 1940184

31 Mar 1940128

25 Jun 1940126

29 Mar 1940100

3 Apr 194098

24 May 194078

25 Apr 194070

1 Apr 194066

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.

← 25 Jun 1940 26 Sep 1940 →

About this page

Max Kp 8-, Ap 58: No. 647 of 34,615 days since 1932 by Ap.