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Geomagnetic activity in November 1990
Mean Ap8.9No. 854 of 1138
G1+ days2
G3+ days1
Max Ap4527 Nov 1990
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 27 Nov 1990 | 7- | 45 | G3 |
| 28 Nov 1990 | 5- | 18 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| November 1989 | 19.2 | 9 | 2 |
| November 1990 | 8.9 | 2 | 1 |
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 8.9 in November 1990, No. 854 of 1138 months since 1932; 2 days reached G1 or higher.