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Geomagnetic storm on 21 Oct 2001 (G4)

Max Kp8-G4

Ap57No. 9 in 2001

Consecutive G1+ days3

Ap rank688since 1932

Kp by 3-hour slot (UTC)

00–033o

03–063-

06–092o

09–121+

12–152o

15–186o

18–217+

21–248-

The days around it

Date	Max Kp	Ap	Level
18 Oct 2001	2-	3	–
19 Oct 2001	3+	9	–
20 Oct 2001	3+	11	–
21 Oct 2001	8-	57	G4
22 Oct 2001	7+	96	G3
23 Oct 2001	5+	17	G1
24 Oct 2001	1-	2	–

Highest-Ap days of 2001

31 Mar 2001192

6 Nov 2001142

24 Nov 2001104

22 Oct 200196

11 Apr 200185

20 Mar 200174

3 Oct 200169

8 Apr 200163

21 Oct 200157

2 Oct 200152

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.

← 3 Oct 2001 22 Oct 2001 →

About this page

Max Kp 8-, Ap 57: No. 688 of 34,615 days since 1932 by Ap.