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Geomagnetic storm on 30 Apr 1985 (G3)

Max Kp7+G3

Ap42No. 13 in 1985

Consecutive G1+ days5

Ap rank1,451since 1932

Kp by 3-hour slot (UTC)

00–032-

03–060+

06–091o

09–125+

12–157+

15–185o

18–215o

21–243+

The days around it

Date	Max Kp	Ap	Level
27 Apr 1985	6-	33	G2
28 Apr 1985	7o	61	G3
29 Apr 1985	6o	17	G2
30 Apr 1985	7+	42	G3
1 May 1985	3o	10	–
2 May 1985	6o	38	G2
3 May 1985	3-	6	–

Highest-Ap days of 1985

21 Apr 1985103

5 Oct 198566

28 Apr 198561

28 Feb 198560

28 Jan 198558

20 Apr 198553

30 Nov 198552

12 Jul 198548

9 Jan 198546

6 Feb 198546

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.

← 28 Apr 1985 12 Jul 1985 →

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Max Kp 7+, Ap 42: No. 1,451 of 34,615 days since 1932 by Ap.