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Geomagnetic storm on 18 May 1981 (G3)

Max Kp7oG3

Ap57No. 12 in 1981

Consecutive G1+ days4

Ap rank683since 1932

Kp by 3-hour slot (UTC)

00–035o

03–067o

06–097-

09–125o

12–154+

15–184+

18–215-

21–243-

The days around it

Date	Max Kp	Ap	Level
15 May 1981	7o	54	G3
16 May 1981	6+	59	G2
17 May 1981	5+	13	G1
18 May 1981	7o	57	G3
19 May 1981	4+	18	–
20 May 1981	6+	43	G2
21 May 1981	4o	12	–

Highest-Ap days of 1981

25 Jul 1981134

13 Apr 1981121

12 Apr 198196

5 Mar 198181

26 Jul 198178

14 Oct 198173

22 Oct 198172

20 Oct 198167

26 Apr 198162

11 May 198161

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.

← 15 May 1981 7 Jun 1981 →

About this page

Max Kp 7o, Ap 57: No. 683 of 34,615 days since 1932 by Ap.