1988 Armenian earthquake
The 1988 Armenian earthquake, also known as the Spitak earthquake (, "Spitaki yerkrasharj"), occurred on December 7 at with a surface wave magnitude of 6.8 and a maximum MSK intensity of X ("Devastating"). The shock occurred in the northern region of Armenia (then part of the Soviet Union) which is vulnerable to large and destructive earthquakes and is part of a larger active seismic belt that stretches from the Alps to the Himalayas. Activity in the area is associated with tectonic plate boundary interaction and the source of the event was slip on a thrust fault just to the north of Spitak. The complex incident ruptured multiple faults, with a strike-slip event occurring shortly after the initiation of the mainshock. Between 25,000 and 50,000 were killed and up to 130,000 were injured.