Aurora & Space WeatherGeomagnetic activity in 1985
Mean Ap13.7
G1+83days
G3+10days
G50days
G1+ days by month
- January 1985
- February 1985
- March 1985
- April 1985
- May 1985
- June 1985
- July 1985
- August 1985
- September 1985
- October 1985
- November 1985
- December 1985
Nearby years (G1+ days)
58
97
159
140
139
83
71
56
59
123
104
Top 10 days by Ap
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 21 Apr 1985 | 8+ | 103 | G4 |
| 5 Oct 1985 | 7o | 66 | G3 |
| 28 Apr 1985 | 7o | 61 | G3 |
| 28 Feb 1985 | 7o | 60 | G3 |
| 28 Jan 1985 | 6o | 58 | G2 |
| 20 Apr 1985 | 7- | 53 | G3 |
| 30 Nov 1985 | 7+ | 52 | G3 |
| 12 Jul 1985 | 7- | 48 | G3 |
| 9 Jan 1985 | 6o | 46 | G2 |
| 6 Feb 1985 | 6- | 46 | 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
1985 had 83 G1+ storm days (No. 39 of 95 years) and 10 G3+ days.