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Geomagnetic activity in April 1997
Mean Ap10.2No. 728 of 1138
G1+ days7
G3+ days1
Max Ap3711 Apr 1997
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 10 Apr 1997 | 5o | 13 | G1 |
| 11 Apr 1997 | 7- | 37 | G3 |
| 16 Apr 1997 | 5o | 16 | G1 |
| 17 Apr 1997 | 5+ | 24 | G1 |
| 21 Apr 1997 | 5- | 20 | G1 |
| 22 Apr 1997 | 5+ | 15 | G1 |
| 24 Apr 1997 | 5- | 13 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| April 1996 | 11.0 | 6 | 1 |
| April 1997 | 10.2 | 7 | 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 10.2 in April 1997, No. 728 of 1138 months since 1932; 7 days reached G1 or higher.