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Geomagnetic storm on 11 May 1938 (G5)

Max Kp9-G5

Ap103No. 5 in 1938

Consecutive G1+ days5

Ap rank149since 1932

Kp by 3-hour slot (UTC)

00–033-

03–063-

06–092o

09–122+

12–152o

15–188-

18–219-

21–249-

The days around it

Date	Max Kp	Ap	Level
8 May 1938	2o	5	–
9 May 1938	3o	5	–
10 May 1938	3+	8	–
11 May 1938	9-	103	G5
12 May 1938	7+	76	G3
13 May 1938	6+	17	G2
14 May 1938	6+	40	G2

Highest-Ap days of 1938

16 Apr 1938136

22 Jan 1938128

17 Jan 1938120

25 Jan 1938107

11 May 1938103

15 Sep 1938100

12 May 193876

15 Jul 193867

7 Oct 193867

26 Jan 193862

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.

← 4 May 1938 12 May 1938 →

About this page

Max Kp 9-, Ap 103: No. 149 of 34,615 days since 1932 by Ap.