In recent decades Oni has suffered from earthquakes and a series of avalanches . A particularly severe earthquake occurred on 29 April 1991 . The earthquake measured 7.0 on the moment magnitude scale with a maximum MSK intensity of IX ( '' Destructive '' ) , the most powerful ever recorded in the Caucasus Mountains , and caused significant damage to the infrastructure of Oni
severe earthquake
1991 Racha earthquake
Oni, Georgia