An earthquake destroyed the city of Dvin, Armenia, resulting in about 30,000 casualties. 893 Dvin earthquake: The 893 Dvin earthquake occurred on 28 December 893 at around midnight. It had a magnitude of approximately 6 and a maximum intensity of approximately IX (Violent) on the Mercalli intensity scale. It destroyed the city of Dvin in Armenia, causing approximately 30,000 casualties. December 28, 893. Wiki link