The Attenuation Relations of Strong Ground Motion Parameters in East of Iran

Estimation of strong ground motion attenuation relations is one of the important problems in earthquake risk analysis and more interesting research subjects in earthquake seismology. In this study, the attenuation relations of horizontal and vertical peak acceleration in East of Iran (one of the active seismotectonic province of Iran) are investigated. Fukushima & Tanaka (1990) model and two steps analysis methods are used in this research. The constant parameters of model are determined for three different soil types using 128 records of 54 earthquakes with magnitude and acceleration values larger than 4.5 and 0.015 g respectively.