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Geomagnetic storm on 21 Oct 1957 (G3)

Max Kp7-G3

Ap28No. 66 in 1957

Consecutive G1+ days1

Ap rank3,313since 1932

Kp by 3-hour slot (UTC)

00–033+

03–063-

06–093-

09–122-

12–153-

15–184o

18–214-

21–247-

The days around it

Date	Max Kp	Ap	Level
18 Oct 1957	3-	6	–
19 Oct 1957	3+	9	–
20 Oct 1957	4o	11	–
21 Oct 1957	7-	28	G3
22 Oct 1957	4+	19	–
23 Oct 1957	5o	20	G1
24 Oct 1957	4-	9	–

Highest-Ap days of 1957

23 Sep 1957164

13 Sep 1957160

30 Jun 1957150

4 Sep 1957145

29 Sep 1957139

3 Sep 1957135

2 Mar 1957132

5 Sep 1957112

22 Sep 1957104

2 Sep 1957102

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.

← 29 Sep 1957 7 Nov 1957 →

About this page

Max Kp 7-, Ap 28: No. 3,313 of 34,615 days since 1932 by Ap.