In August 1968 and September 1978 , the region was the scene of two major earthquakes that left 12,000 and 25,000 people dead , respectively . A third major earthquake , the 1997 Qayen earthquake , took place on 10 May 1997 and left 1,567 dead , 2,300 injured , and 50,000 homeless
1997 Qayen earthquake
1997 Qayen earthquake
Khorasan Province