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Geomagnetic activity in November 1987
Mean Ap12.9No. 513 of 1138
G1+ days8
G3+ days0
Max Ap3523 Nov 1987
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 2 Nov 1987 | 5+ | 23 | G1 |
| 3 Nov 1987 | 5+ | 27 | G1 |
| 9 Nov 1987 | 5- | 10 | G1 |
| 12 Nov 1987 | 5o | 20 | G1 |
| 13 Nov 1987 | 5- | 27 | G1 |
| 23 Nov 1987 | 5+ | 35 | G1 |
| 24 Nov 1987 | 5- | 24 | G1 |
| 27 Nov 1987 | 5- | 20 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| November 1986 | 13.3 | 7 | 1 |
| November 1987 | 12.9 | 8 | 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 12.9 in November 1987, No. 513 of 1138 months since 1932; 8 days reached G1 or higher.