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Geomagnetic storm on 30 Apr 1978 (G4)

Max Kp8oG4

Ap58No. 14 in 1978

Consecutive G1+ days5

Ap rank667since 1932

Kp by 3-hour slot (UTC)

00–033+

03–063-

06–092o

09–125o

12–157-

15–188o

18–214-

21–245-

The days around it

Date	Max Kp	Ap	Level
27 Apr 1978	4o	16	–
28 Apr 1978	3+	12	–
29 Apr 1978	2+	6	–
30 Apr 1978	8o	58	G4
1 May 1978	8+	88	G4
2 May 1978	7+	94	G3
3 May 1978	7o	83	G3

Highest-Ap days of 1978

28 Aug 1978124

29 Sep 1978109

4 May 197896

2 May 197894

4 Jan 197889

1 May 197888

9 May 197885

3 May 197883

2 Jun 197882

4 Jul 197880

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.

← 12 Apr 1978 1 May 1978 →

About this page

Max Kp 8o, Ap 58: No. 667 of 34,615 days since 1932 by Ap.