1931 Zangezur earthquake
1931 CE.
Shown on the map at 39.200°, 46.000°.
The 1931 Zangezur earthquake occurred on April 27 at 20:50:45 local time with a moment magnitude of 6.5. The earthquake was located in the Zangezur Mountains near the boundary between southwestern Armenia and Azerbaijan's exclave, the Nakhichivan Autonomous Republic. Both territories were part of the Soviet Union at that time.
Text from the Wikipedia article 1931 Zangezur earthquake, licensed CC BY-SA 4.0.