Iran strong motion network

This paper describes current activities in the field of strong motion research in Iran. Theseismotectonics and seismological background is explained and current strong motionmonitoring in Iran is summarised. The Strong Ground Motion Network of Iran started itsactivities since 1973, and has recorded more than 4200 accelerograms. The highest ground acceleration recorded in this network was 1g at Zanjiran station in 1994 Zanjiran earthquake. At present the network consists of 986 digital and 71 analogue accelerograph. ISMN has been installed 92 accelerographs in 54 dams. The geophisical and geotechnical investigations for site geology have been conducted in 100 accelerograph stations.