الفهرس 
General BackgroundOnly 14 pages are availabe for public view
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Abstract
Sinai-Peninsula-Region is a tectonic/seismologic, geologic, and
economic significant region, which includes different crustal unites
and types acts for a very complex lithospheric structure. Due to this
complexity, a need for the detailed 3D velocity structure model is
essential for a better location and focal mechanism solution of the
earthquakes in this region, so that a more reliable hazard assessment is
available. Moreover, the 3D velocity model is an effective tool to
reveal the crustal and mantle structures by seismic wave ray tracing
techniques derived from its estimated travel times. Consequently, this
velocity model could also image/answer the unpredictable questions
about the geodynamic with a good reliability, which provides a true
understanding/assessment of the geodynamic hazard potentialities in a
region that’s known for its neotectonic reactivation.
Following a strategy/methodology in the current thesis is to
overcome such lithospheric complexity and achieve a detailed/reliable
3D crustal velocity modeling study. Through, enhanced re-picking/relocation
of the local and regional earthquakes dataset (1445 events),
then inverting it for a high-resolution body-wave tomography. The
reliability of this inversion was assisted by increasing the quality and
quantity of the re-picked P- and S-arrivals by applying Wadati
enhancement and adding other arrivals from neighbor seismological
networks, in addition, using an accurate initial velocity model that
reliably distribute the depths of the major velocity discontinuities.
Whereas the best possible detailed was reliably guaranteed by a
precise/careful estimation of the damping value and spatial distribution
of the inversion mesh, the reliability of the model (Velocity structure)
was tested through the checkerboard test.
The obtained velocity structure approves/images the results of
many previous studies that used different geophysical methodologies.
Furthermore, the reliability/efficiency of the new model for solving the
focal mechanism have been tested through a comprehensive revision
on the enhanced dataset. The present study resulted in revealing a
detached slab that assumed to prevent the development of Suez Rifting
and any north extension of the Dead Sea Transform in the Northern
Red Sea as well. Three hazard potentialities in the crust were revealed
and oil potentialities are suggested, in addition, solving new focal
mechanisms in Sinai-Peninsula-Region.