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Geomagnetic storm on 21 Sep 1967 (G3)

Max Kp7+G3

Ap85No. 4 in 1967

Consecutive G1+ days3

Ap rank256since 1932

Kp by 3-hour slot (UTC)

00–037o

03–067+

06–096-

09–126-

12–155o

15–187-

18–215+

21–245o

The days around it

Date	Max Kp	Ap	Level
18 Sep 1967	4-	12	–
19 Sep 1967	5-	18	G1
20 Sep 1967	6-	44	G2
21 Sep 1967	7+	85	G3
22 Sep 1967	4o	10	–
23 Sep 1967	2-	4	–
24 Sep 1967	2+	6	–

Highest-Ap days of 1967

26 May 1967146

25 May 1967130

3 May 196787

21 Sep 196785

16 Feb 196764

14 Jan 196761

8 Jan 196760

31 Dec 196759

28 May 196755

8 Feb 196746

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.

← 7 Jun 1967 5 Apr 1968 →

About this page

Max Kp 7+, Ap 85: No. 256 of 34,615 days since 1932 by Ap.