Evaluation of seismotectonic in South Western Arabia

الملخص EN

This paper is concerned with the evaluation of seismotectonic of the south - western Arabia based, on the available earthquake records utilizing the geostatistical technique.

The Cumulative Semivariogram (CSV) technique, which is the basic geostatistical tool for irregular and regular spaced data, is used to describe the spatial variability of earthquakes in the region and their structural control.

It is found that the seismotectonic of the area is direction independent and the spatial distribution of earthquakes epicenters within the study region is rather heterogeneous, except for a small portion of transform faults that exist between offset spreading ridges of the axial trough of the Red Sea and the western part of the Gulf of Aden.

Consequently, a point source model can be justified for the regional seismic hazard evaluation and the mapping of earthquake ground motion in the study region.