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Geomagnetic activity in February 1990
Mean Ap22.9No. 94 of 1138
G1+ days18
G3+ days2
Max Ap5016 Feb 1990
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Feb 1990 | 5o | 22 | G1 |
| 2 Feb 1990 | 5- | 25 | G1 |
| 4 Feb 1990 | 5+ | 28 | G1 |
| 5 Feb 1990 | 5- | 24 | G1 |
| 7 Feb 1990 | 5o | 25 | G1 |
| 14 Feb 1990 | 6+ | 30 | G2 |
| 15 Feb 1990 | 7- | 36 | G3 |
| 16 Feb 1990 | 7- | 50 | G3 |
| 17 Feb 1990 | 6o | 33 | G2 |
| 18 Feb 1990 | 5- | 23 | G1 |
| 19 Feb 1990 | 5o | 33 | G1 |
| 20 Feb 1990 | 5+ | 38 | G1 |
| 22 Feb 1990 | 5- | 21 | G1 |
| 23 Feb 1990 | 5o | 36 | G1 |
| 24 Feb 1990 | 5+ | 29 | G1 |
| 25 Feb 1990 | 5o | 29 | G1 |
| 27 Feb 1990 | 5o | 26 | G1 |
| 28 Feb 1990 | 6o | 31 | G2 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1989 | 15.5 | 6 | 0 |
| February 1990 | 22.9 | 18 | 2 |
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 22.9 in February 1990, No. 94 of 1138 months since 1932; 18 days reached G1 or higher.