Aurora & Space WeatherGeomagnetic activity in 2011
Mean Ap7.5
G1+34days
G3+3days
G50days
G1+ days by month
- January 2011
- February 2011
- March 2011
- April 2011
- May 2011
- June 2011
- July 2011
- August 2011
- September 2011
- October 2011
- November 2011
- December 2011
Nearby years (G1+ days)
40
29
16
4
15
34
52
30
23
69
63
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 28 May 2011 | 6+ | 45 | G2 |
| 5 Aug 2011 | 8- | 42 | G4 |
| 10 Sep 2011 | 6- | 40 | G2 |
| 26 Sep 2011 | 6+ | 38 | G2 |
| 25 Oct 2011 | 7+ | 38 | G3 |
| 11 Mar 2011 | 6- | 37 | G2 |
| 29 May 2011 | 5+ | 34 | G1 |
| 17 Sep 2011 | 5+ | 32 | G1 |
| 6 Aug 2011 | 6+ | 31 | G2 |
| 9 Sep 2011 | 6- | 30 | G2 |
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.
About this page
2011 had 34 G1+ storm days (No. 84 of 95 years) and 3 G3+ days.