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Geomagnetic activity in November 1999
Mean Ap13.9No. 446 of 1138
G1+ days8
G3+ days0
Max Ap4313 Nov 1999
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 7 Nov 1999 | 5o | 31 | G1 |
| 8 Nov 1999 | 5- | 29 | G1 |
| 9 Nov 1999 | 5- | 28 | G1 |
| 11 Nov 1999 | 5- | 26 | G1 |
| 13 Nov 1999 | 6+ | 43 | G2 |
| 23 Nov 1999 | 5- | 19 | G1 |
| 24 Nov 1999 | 5o | 21 | G1 |
| 25 Nov 1999 | 5- | 18 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| November 1998 | 16.1 | 5 | 2 |
| November 1999 | 13.9 | 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 13.9 in November 1999, No. 446 of 1138 months since 1932; 8 days reached G1 or higher.