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Geomagnetic storm on 25 Apr 1937 (G3)

Max Kp7+G3

Ap72No. 3 in 1937

Consecutive G1+ days5

Ap rank387since 1932

Kp by 3-hour slot (UTC)

00–037o

03–064-

06–094-

09–122-

12–151o

15–186o

18–217+

21–247+

The days around it

Date	Max Kp	Ap	Level
22 Apr 1937	2o	4	–
23 Apr 1937	3o	6	–
24 Apr 1937	8o	45	G4
25 Apr 1937	7+	72	G3
26 Apr 1937	8+	67	G4
27 Apr 1937	7o	61	G3
28 Apr 1937	8o	128	G4

Highest-Ap days of 1937

28 Apr 1937128

22 Aug 193774

25 Apr 193772

4 Oct 193771

26 Apr 193767

5 May 193765

27 Apr 193761

3 Feb 193756

31 Mar 193753

28 May 193750

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.

← 24 Apr 1937 26 Apr 1937 →

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Max Kp 7+, Ap 72: No. 387 of 34,615 days since 1932 by Ap.