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Geomagnetic activity in September 1968
Mean Ap13.8No. 449 of 1138
G1+ days7
G3+ days0
Max Ap488 Sep 1968
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 7 Sep 1968 | 5+ | 18 | G1 |
| 8 Sep 1968 | 6- | 48 | G2 |
| 12 Sep 1968 | 5- | 19 | G1 |
| 13 Sep 1968 | 6- | 43 | G2 |
| 14 Sep 1968 | 5- | 29 | G1 |
| 15 Sep 1968 | 5o | 30 | G1 |
| 23 Sep 1968 | 5- | 22 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| September 1967 | 16.2 | 8 | 1 |
| September 1968 | 13.8 | 7 | 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 13.8 in September 1968, No. 449 of 1138 months since 1932; 7 days reached G1 or higher.