Receiver function probing of the crust in northern Iran

Preliminary results of a receiver function analysis made on the teleseismic earthquakes recorded by ILPA(Iranian Long Period Seismic Array) and TTSN ( Tehran Telemetry Seismic Network) indicate crustal thicknesses of more than 45 km across the region. Our observations also give evidence of a major increase in seismic impedance at depths between 20 and 30 km underneath the recording stations.This intracrustal seismic discontinuity is the sharpest in the area where the Damavand Volcano is located.