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Abstract
Earthquakes are the most typical phenomena of natural hazards. They have effects on nature, human life and man made structures. Assessment of earthquake occurrence sequences for any area plays an important role in proposing measures to minimize earthquake damage and to anticipate the future development for the strategic projects. The main objective of this work is to describe the main characteristics of the active tectonics, which are the indispensable to a reliable evaluation of the seismic risk and to establish a number of earthquake hazard maps for Sinai Peninsula, these maps expressed in the form of the maximum expected ground motion at different return periods. The accuracy of such maps require an accurate seismo-tectonic model taking into account the geological and tectonic information beside the seismological data. To construct the seismo-tectonic model and to delineate more accurate seismic zones in the study area, the following steps are performed: compiling the surface faults and the major structure elements based on the previous published works and the present landsat images, compiling a homogeneous complete earthquake catalog, focal mechanisms of the moderate events recorded by the Egyptian National Seismic Network (ENSN) digital stations, compiling our focal mechanisms with previously published Centroid Moment tensor (CMT) solutions, applying stress tensor inversion to obtain a representative focal mechanism for each seismic source zone, and determining the seismicity level for each seismic source zone.