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Geomagnetic activity in October 1989
Mean Ap21.1No. 128 of 1138
G1+ days8
G3+ days2
Max Ap14621 Oct 1989
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 19 Oct 1989 | 5+ | 24 | G1 |
| 20 Oct 1989 | 8+ | 112 | G4 |
| 21 Oct 1989 | 8+ | 146 | G4 |
| 22 Oct 1989 | 6+ | 51 | G2 |
| 23 Oct 1989 | 6- | 22 | G2 |
| 25 Oct 1989 | 5o | 23 | G1 |
| 26 Oct 1989 | 5o | 24 | G1 |
| 30 Oct 1989 | 5o | 23 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| October 1988 | 12.5 | 3 | 1 |
| October 1989 | 21.1 | 8 | 2 |
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.
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About this page
Mean Ap 21.1 in October 1989, No. 128 of 1138 months since 1932; 8 days reached G1 or higher.