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Geomagnetic activity in September 1983
Mean Ap14.5No. 393 of 1138
G1+ days8
G3+ days0
Max Ap5419 Sep 1983
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 1 Sep 1983 | 5- | 17 | G1 |
| 7 Sep 1983 | 5+ | 22 | G1 |
| 15 Sep 1983 | 5- | 21 | G1 |
| 16 Sep 1983 | 5- | 26 | G1 |
| 17 Sep 1983 | 5+ | 25 | G1 |
| 19 Sep 1983 | 6+ | 54 | G2 |
| 25 Sep 1983 | 5+ | 33 | G1 |
| 26 Sep 1983 | 5+ | 28 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1982 | 35.9 | 15 | 8 |
| September 1983 | 14.5 | 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 14.5 in September 1983, No. 393 of 1138 months since 1932; 8 days reached G1 or higher.