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Geomagnetic activity in December 1997
Mean Ap4.5No. 1116 of 1138
G1+ days1
G3+ days0
Max Ap2130 Dec 1997
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 30 Dec 1997 | 5- | 21 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| December 1996 | 7.0 | 2 | 0 |
| December 1997 | 4.5 | 1 | 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 4.5 in December 1997, No. 1116 of 1138 months since 1932; 1 days reached G1 or higher.