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Geomagnetic storm on 30 Jun 1957 (G4)

Max Kp8+G4

Ap150No. 3 in 1957

Consecutive G1+ days7

Ap rank45since 1932

Kp by 3-hour slot (UTC)

00–033o

03–066+

06–095+

09–128-

12–158o

15–188o

18–218o

21–248+

The days around it

Date	Max Kp	Ap	Level
27 Jun 1957	4+	17	–
28 Jun 1957	4+	18	–
29 Jun 1957	2+	5	–
30 Jun 1957	8+	150	G4
1 Jul 1957	7+	83	G3
2 Jul 1957	8o	55	G4
3 Jul 1957	6-	30	G2

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.

← 26 Jun 1957 1 Jul 1957 →

About this page

Max Kp 8+, Ap 150: No. 45 of 34,615 days since 1932 by Ap.