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Geomagnetic storm on 16 Apr 1938 (G5)

Max Kp9oG5

Ap136No. 1 in 1938

Consecutive G1+ days4

Ap rank64since 1932

Kp by 3-hour slot (UTC)

00–033+

03–067o

06–099o

09–128o

12–158-

15–186-

18–214+

21–245+

The days around it

Date	Max Kp	Ap	Level
13 Apr 1938	7-	36	G3
14 Apr 1938	7o	60	G3
15 Apr 1938	5-	19	G1
16 Apr 1938	9o	136	G5
17 Apr 1938	4+	21	–
18 Apr 1938	4-	18	–
19 Apr 1938	4-	11	–

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.

← 14 Apr 1938 4 May 1938 →

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Max Kp 9o, Ap 136: No. 64 of 34,615 days since 1932 by Ap.