Aurora & Space WeatherHome › Geomagnetic history › 1985
Geomagnetic activity in March 1985
Mean Ap11.4No. 634 of 1138
G1+ days6
G3+ days0
Max Ap425 Mar 1985
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Mar 1985 | 5+ | 16 | G1 |
| 3 Mar 1985 | 5- | 14 | G1 |
| 5 Mar 1985 | 6+ | 42 | G2 |
| 6 Mar 1985 | 5- | 24 | G1 |
| 7 Mar 1985 | 5- | 22 | G1 |
| 8 Mar 1985 | 5+ | 27 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| March 1984 | 21.1 | 14 | 1 |
| March 1985 | 11.4 | 6 | 0 |
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
Mean Ap 11.4 in March 1985, No. 634 of 1138 months since 1932; 6 days reached G1 or higher.