1899 Aydın–Denizli earthquake
| Local date | 20 September 1899 |
|---|---|
| Local time | 04:00 |
| Magnitude | 6.5–7.1 Mw |
| Epicenter | 37°54′N 28°06′E / 37.9°N 28.1°E |
| Areas affected | Ottoman Empire |
| Max. intensity | MMI IX (Violent) |
| Casualties | 1,117–1,470 fatalities, "hundreds" injured |
The 1899 Aydın–Denizli earthquake which struck present-day Turkey on September 20 resulted in between 1,117 and 1,470 fatalities. Heavy damage was reported in the provinces of Aydın and Denizli. The shallow normal-faulting earthquake had a maximum Modified Mercalli intensity of IX (Violent). Estimates of the seismic magnitude range from 6.5 to 7.1 Mw.