Aurora & Space WeatherGeomagnetic activity in 2018
Mean Ap6.9
G1+20days
G3+1days
G50days
G1+ days by month
- January 2018
- February 2018
- March 2018
- April 2018
- May 2018
- June 2018
- July 2018
- August 2018
- September 2018
- October 2018
- November 2018
- December 2018
Nearby years (G1+ days)
30
23
69
63
53
20
18
9
27
55
51
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 26 Aug 2018 | 7+ | 67 | G3 |
| 20 Apr 2018 | 6o | 43 | G2 |
| 11 Sep 2018 | 6o | 35 | G2 |
| 5 Nov 2018 | 6- | 32 | G2 |
| 22 Sep 2018 | 5- | 27 | G1 |
| 6 May 2018 | 6- | 26 | G2 |
| 27 Aug 2018 | 6- | 25 | G2 |
| 7 Oct 2018 | 5+ | 24 | G1 |
| 5 May 2018 | 6- | 23 | G2 |
| 1 Jun 2018 | 5- | 23 | 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
2018 had 20 G1+ storm days (No. 90 of 95 years) and 1 G3+ days.