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Geomagnetic activity in August 2025
Mean Ap9.9No. 762 of 1138
G1+ days3
G3+ days0
Max Ap439 Aug 2025
Daily Ap
Daily max Kp
| Date | Max Kp | Ap | Level |
|---|---|---|---|
| 8 Aug 2025 | 5o | 20 | G1 |
| 9 Aug 2025 | 6- | 43 | G2 |
| 19 Aug 2025 | 5- | 19 | G1 |
Same month a year earlier
| Month | Mean Ap | G1+ | G3+ |
|---|---|---|---|
| August 2024 | 15.9 | 8 | 2 |
| August 2025 | 9.9 | 3 | 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 9.9 in August 2025, No. 762 of 1138 months since 1932; 3 days reached G1 or higher.