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Geomagnetic storm on 21 Jan 2005 (G4)

Max Kp8oG4

Ap66No. 8 in 2005

Consecutive G1+ days6

Ap rank483since 1932

Kp by 3-hour slot (UTC)

00–033+

03–062o

06–092+

09–122+

12–153-

15–187-

18–218o

21–247+

The days around it

Date	Max Kp	Ap	Level
18 Jan 2005	8-	84	G4
19 Jan 2005	7-	60	G3
20 Jan 2005	5-	17	G1
21 Jan 2005	8o	66	G4
22 Jan 2005	6o	33	G2
23 Jan 2005	4o	19	–
24 Jan 2005	3o	10	–

Highest-Ap days of 2005

24 Aug 2005102

11 Sep 2005101

8 May 200591

30 May 200590

15 May 200587

18 Jan 200584

12 Sep 200575

21 Jan 200566

19 Jan 200560

17 Jan 200558

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.

← 19 Jan 2005 5 Apr 2005 →

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Max Kp 8o, Ap 66: No. 483 of 34,615 days since 1932 by Ap.