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Geomagnetic activity in February 1998
Mean Ap7.9No. 946 of 1138
G1+ days3
G3+ days1
Max Ap3618 Feb 1998
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 17 Feb 1998 | 6- | 18 | G2 |
| 18 Feb 1998 | 7- | 36 | G3 |
| 28 Feb 1998 | 5o | 15 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| February 1997 | 11.1 | 4 | 1 |
| February 1998 | 7.9 | 3 | 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 7.9 in February 1998, No. 946 of 1138 months since 1932; 3 days reached G1 or higher.