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Geomagnetic storm on 25 Jan 1938 (G5)

Max Kp9-G5

Ap107No. 4 in 1938

Consecutive G1+ days2

Ap rank139since 1932

Kp by 3-hour slot (UTC)

00–034o

03–063-

06–092-

09–125-

12–156o

15–187+

18–219-

21–248+

The days around it

Date	Max Kp	Ap	Level
22 Jan 1938	8+	128	G4
23 Jan 1938	4+	16	–
24 Jan 1938	4-	16	–
25 Jan 1938	9-	107	G5
26 Jan 1938	8+	62	G4
27 Jan 1938	4-	12	–
28 Jan 1938	3+	10	–

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.

← 22 Jan 1938 26 Jan 1938 →

About this page

Max Kp 9-, Ap 107: No. 139 of 34,615 days since 1932 by Ap.