الفهرس 
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Abstract
The present work attempts to throw some light on the seismic deformation on the Suez and Aqaba Gulfs. To reach this goal moment tensors were calculated to estimate the rate of seismic deformation. The dedformation due to seismic activity can be estimated on the basis of the analysis of moment tensor. The complete description of the seismic moment tensor can be obtained by a combination of fault plane solution and scalar seismic moment (Aki and Richard, 1980). We relocated the entire events recorded by Hurghada Seismic Network within the southern part of the Gulf of Suez during the period from 19941998, to get a clear view of seismicity. The resulting moment tensor provides a fault plane solution is mainly normal fault mechanism and the dominant mode of deformation is extension. The rate of extension is 3 mm/yr in the 53<U+00BA> ENE direction. The thinning of the seismogenic layer is 0.6 mm/yr which is consistent with the normal fault observed. There is a slight component of shear motion in the direction parallel to the strike of the gulf. The shape of deformation from the small earthquakes is in direction identical to the shape of deformation from the large earthquakes in the southern part of the Gulf of Suez, that the tension axis is nearly in the NESW direction with the occurrence of a normal fault mechanism. We also studied the rate and shape of deformation in the Gulf of Aqaba. The summed moment tensors correspond to a left lateral strike slip mechanism. The dominant components of the strain tensor are (Rb(Sf(B22 which corresponds to an extension in the N62<U+00BA>E and (Rb(Sf(B12 which corresponds to a shear motion in the NNE direction. The corresponding velocities are 9 mm/yr for the extension in the N62<U+00BA>E direction and 7 mm/yr for the left lateral strike slip motion in the direction parallel with the strike of the Gulf. The negative component (Rb(Sf(B33 indicates thinning of the seismogenic layer, equivalent to 2 mm/yr.