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Geomagnetic storm on 27 Sep 1938 (G3)

Max Kp7oG3

Ap30No. 48 in 1938

Consecutive G1+ days3

Ap rank2,845since 1932

Kp by 3-hour slot (UTC)

00–033-

03–063-

06–094o

09–123o

12–153o

15–183o

18–213o

21–247o

The days around it

Date	Max Kp	Ap	Level
24 Sep 1938	2-	3	–
25 Sep 1938	2+	4	–
26 Sep 1938	5+	38	G1
27 Sep 1938	7o	30	G3
28 Sep 1938	8-	56	G4
29 Sep 1938	4+	16	–
30 Sep 1938	7-	32	G3

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.

← 15 Sep 1938 28 Sep 1938 →

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Max Kp 7o, Ap 30: No. 2,845 of 34,615 days since 1932 by Ap.