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Geomagnetic storm on 1 Apr 1973 (G4)

Max Kp8+G4

Ap91No. 1 in 1973

Consecutive G1+ days4

Ap rank210since 1932

Kp by 3-hour slot (UTC)

00–034o

03–063-

06–093o

09–124o

12–155+

15–188-

18–218+

21–248-

The days around it

Date	Max Kp	Ap	Level
29 Mar 1973	4+	16	–
30 Mar 1973	4o	15	–
31 Mar 1973	6o	33	G2
1 Apr 1973	8+	91	G4
2 Apr 1973	7o	54	G3
3 Apr 1973	5+	26	G1
4 Apr 1973	3o	9	–

Highest-Ap days of 1973

1 Apr 197391

29 Oct 197386

19 Mar 197382

20 Mar 197380

14 May 197380

23 Sep 197363

16 Apr 197360

29 Apr 197359

21 Mar 197358

14 Apr 197357

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.

← 20 Mar 1973 2 Apr 1973 →

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Max Kp 8+, Ap 91: No. 210 of 34,615 days since 1932 by Ap.