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Geomagnetic storm on 25 Jul 1981 (G4)

Max Kp8+G4

Ap134No. 1 in 1981

Consecutive G1+ days6

Ap rank70since 1932

Kp by 3-hour slot (UTC)

00–034+

03–066-

06–097-

09–124+

12–158+

15–188+

18–218-

21–248-

The days around it

Date	Max Kp	Ap	Level
22 Jul 1981	5-	24	G1
23 Jul 1981	6-	37	G2
24 Jul 1981	5-	13	G1
25 Jul 1981	8+	134	G4
26 Jul 1981	8o	78	G4
27 Jul 1981	5o	24	G1
28 Jul 1981	3-	8	–

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.

← 7 Jun 1981 26 Jul 1981 →

About this page

Max Kp 8+, Ap 134: No. 70 of 34,615 days since 1932 by Ap.