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Geomagnetic activity in March 1990
Mean Ap23.3No. 88 of 1138
G1+ days15
G3+ days4
Max Ap7621 Mar 1990
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 6 Mar 1990 | 5o | 21 | G1 |
| 12 Mar 1990 | 7+ | 42 | G3 |
| 13 Mar 1990 | 6+ | 29 | G2 |
| 14 Mar 1990 | 5+ | 26 | G1 |
| 18 Mar 1990 | 6- | 35 | G2 |
| 19 Mar 1990 | 6- | 16 | G2 |
| 20 Mar 1990 | 7- | 30 | G3 |
| 21 Mar 1990 | 7+ | 76 | G3 |
| 22 Mar 1990 | 5- | 28 | G1 |
| 23 Mar 1990 | 5- | 29 | G1 |
| 25 Mar 1990 | 6- | 39 | G2 |
| 26 Mar 1990 | 6o | 41 | G2 |
| 27 Mar 1990 | 5+ | 34 | G1 |
| 29 Mar 1990 | 5+ | 27 | G1 |
| 30 Mar 1990 | 8o | 69 | G4 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| March 1989 | 41.4 | 22 | 7 |
| March 1990 | 23.3 | 15 | 4 |
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 23.3 in March 1990, No. 88 of 1138 months since 1932; 15 days reached G1 or higher.