Surface faults associated with the Qayen, northeast Iran, earthquake of May 10, 1997

抄録

The length of the surface fault that caused the Qayen earthquake of Ms: 7.1 on 10 May,1997 at 12: 27(local time) is 110km. The major fault has the trend N30°W but change its orientation to N25°E at the northern end. The right-lateral displacement was 1.7m (average) and 2.1m (maximum). A living tree was torn in tow by the fault displacement. The northern 30km of the surface fault overlap the fault that caused the 1979 earthquake. This fault length of 110km is longer than would be expected from the magnitude of the event (Ms: 7.1).