Home › Geomagnetic history › 1940

Geomagnetic storm on 18 Jan 1940 (G3)

Max Kp7-G3

Ap38No. 26 in 1940

Consecutive G1+ days2

Ap rank1,725since 1932

Kp by 3-hour slot (UTC)

00–033-

03–063-

06–093+

09–124-

12–155-

15–187-

18–216o

21–243-

The days around it

Date	Max Kp	Ap	Level
15 Jan 1940	3+	7	–
16 Jan 1940	3+	12	–
17 Jan 1940	5o	21	G1
18 Jan 1940	7-	38	G3
19 Jan 1940	3o	8	–
20 Jan 1940	3-	7	–
21 Jan 1940	1+	3	–

Highest-Ap days of 1940

30 Mar 1940189

24 Mar 1940187

25 Mar 1940184

31 Mar 1940128

25 Jun 1940126

29 Mar 1940100

3 Apr 194098

24 May 194078

25 Apr 194070

1 Apr 194066

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.

← 3 Jan 1940 23 Mar 1940 →

About this page

Max Kp 7-, Ap 38: No. 1,725 of 34,615 days since 1932 by Ap.