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      • Open Access Article

        1 - Modeling of displacement field and fault failure behavior based on collocation relationships; Case study of the May 97 Yasuj earthquake
        Abdoulrasol Ghanbari
        The energy released during the rapid movement of the fault is the cause of most earthquakes. In our country, which has active faults and many seismic areas, recognizing the fault movements of the results of these movements is of special importance. In this study, using More
        The energy released during the rapid movement of the fault is the cause of most earthquakes. In our country, which has active faults and many seismic areas, recognizing the fault movements of the results of these movements is of special importance. In this study, using up and down images of Sentinel-1 satellite and using multi-diaphragm radar interferometry techniques and ordinary radar interferometer, the 1397 Yasuj earthquake was studied and an isothermal deformation was prepared in both directions of the satellite line of sight and the azimuth path; And three orthogonal components of the displacement field were extracted using geodetic measurements. Then, in order to obtain the fault geometry and slip distribution on the fault plane, these components were analyzed using collocation optimization method and Akada elastic half-space analytical model. The displacements made due to the displacement of the fault due to the Yasuj earthquake in the study area show that the geological structure of the area after the earthquake has changed from its structure before the earthquake from -80 to -20 cm. Elements of surface displacement components obtained from the model, amount of displacements for Yasuj fault in the study area, the farther the distance from the fault across the Zagros, the less and less displacements, and the closer the adjacent faults, the displacements increase, the maximum altitude displacements for The image frame is equal to 0.45 to -0.45 m and the maximum amount of horizontal displacement is about 18 cm, which is more as it moves from the fault to the plain areas. Manuscript profile