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Geomagnetic activity in October 1998
Mean Ap12.7No. 528 of 1138
G1+ days7
G3+ days1
Max Ap6219 Oct 1998
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Oct 1998 | 5+ | 24 | G1 |
| 2 Oct 1998 | 5+ | 32 | G1 |
| 7 Oct 1998 | 6- | 28 | G2 |
| 19 Oct 1998 | 7- | 62 | G3 |
| 20 Oct 1998 | 5o | 22 | G1 |
| 21 Oct 1998 | 5- | 23 | G1 |
| 27 Oct 1998 | 5- | 10 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1997 | 10.5 | 7 | 1 |
| October 1998 | 12.7 | 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.
← September 1998November 1998 →
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Mean Ap 12.7 in October 1998, No. 528 of 1138 months since 1932; 7 days reached G1 or higher.