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Geomagnetic storm on 15 May 2005 (G4)

Max Kp8+G4

Ap87No. 5 in 2005

Consecutive G1+ days2

Ap rank244since 1932

Kp by 3-hour slot (UTC)

00–036-

03–066-

06–098+

09–128-

12–154o

15–184o

18–215o

21–245o

The days around it

Date	Max Kp	Ap	Level
12 May 2005	4-	14	–
13 May 2005	5-	21	G1
14 May 2005	2+	6	–
15 May 2005	8+	87	G4
16 May 2005	6+	41	G2
17 May 2005	4+	16	–
18 May 2005	3-	7	–

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.

← 8 May 2005 30 May 2005 →

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Max Kp 8+, Ap 87: No. 244 of 34,615 days since 1932 by Ap.