Aurora & Space WeatherGeomagnetic activity in 2017
Mean Ap10.3
G1+53days
G3+4days
G50days
G1+ days by month
- January 2017
- February 2017
- March 2017
- April 2017
- May 2017
- June 2017
- July 2017
- August 2017
- September 2017
- October 2017
- November 2017
- December 2017
Nearby years (G1+ days)
52
30
23
69
63
53
20
18
9
27
55
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Sep 2017 | 8+ | 106 | G4 |
| 28 Sep 2017 | 7- | 51 | G3 |
| 22 Apr 2017 | 6- | 47 | G2 |
| 28 May 2017 | 7o | 47 | G3 |
| 27 Mar 2017 | 6+ | 46 | G2 |
| 16 Jul 2017 | 6o | 44 | G2 |
| 8 Nov 2017 | 6+ | 44 | G2 |
| 27 Sep 2017 | 6+ | 37 | G2 |
| 13 Oct 2017 | 6- | 37 | G2 |
| 23 Apr 2017 | 5+ | 36 | G1 |
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
2017 had 53 G1+ storm days (No. 71 of 95 years) and 4 G3+ days.