1509 Constantinople earthquake
| Local date | 10 September 1509 |
|---|---|
| Local time | 22:00 |
| Magnitude | Ms7.2 ± 0.3 |
| Epicenter | 40°45′N 29°00′E / 40.75°N 29.00°E near the Prince's Islands, Sea of Marmara |
| Fault | North Anatolian Fault |
| Areas affected | Ottoman Empire |
| Tsunami | Yes |
| Casualties | 1,000 to 13,000 dead 10,000 + injured 1070 houses destroyed |
The 1509 Constantinople earthquake or historically Kıyamet-i Sugra ('Minor Judgment Day') occurred in the Sea of Marmara on 10 September 1509 at about 22:00. The earthquake had an estimated magnitude of 7.2 ± 0.3 on the surface-wave magnitude scale. A tsunami and 45 days of aftershocks followed the earthquake. The death toll of this earthquake is poorly known; estimates range between 1,000 and 13,000.