Study of crust in north west of Iran using earthquakedata inversion

Category Tectonic & Seismotectonic
Group GSI.IR
Location 20th symposium on geosciences
Holding Date 16 April 2008

     One of the most important methods to find the main factors responsible for earthquakes is determining the structure of the crust. Determining the crust can help to locate the foucs of the earthquakes more properly even after re-reading the arrival times.
Due to seismicity of Azarbaijan area, Tabriz fault as well as other faults , the necessity of crust study in Azarbaijan is crucial . In order to study the crust in this area, 2654 earthquakes data recorded in 8 stations of Azarbaijan network, during 3 .Oyears, are processed.
1683 earthquakes of the recorded data occurred in this area. By making 42 profiles, including one source and two stations, P-wave travel times are calculated . Then by choosing an initial three-layer model, Depth and velocity parameters of each layer are optimized. The results of optimization are used for contour map plots of velocity and depth variations. Velocity discontinuities and sudden variation in depth, observed on the maps, are related to the faults in the area.

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