الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Recently, one of the important methods for studying crustal deformation, by means of space techniques, is the Global Positioning System (GPS). The earth?s crust deformation attains values of only few millimeters per year and can be determined according to the spatial and time density of the measurements as well as their degree of accuracy. The aim of the current work is to evaluate the recent crustal deformation around the Gulf of Suez. To fulfill this approach, a geodetic network consisting of 11points was established early in 1997. This network was observed six times in different campaigns during the period 1997 <U+2013> 2003. The observed data was analyzed using Bernes 4.2 software to derive velocity vectors along the Gulf of Suez and Sinai Peninsula. The estimated horizontal velocity vectors in the International Terrestrial Reference Frame (ITRF2000) show that the velocity of Sinai Peninsula ranges from 1.8 to 2.3(R+ (B0.5 mm/yr nearly NE direction. This velocity is consistent with those predicted by the model NUVEL1A in the direction but though it is smaller in value. Also, the analyses presented here show that there is a little motion between Sinai area and African plate by about 2(R+ (B0.5 mm/yr towards NNW direction. There is an extension stress ranging from 2 to 4(R+ (B0.5 mm/yr in according with the opening of the Gulf of Suez. The strain Tensor program was used to estimating the principal axes of strains. The principal axes of the strain indicate that an extensional force is acting along the Gulf of Suez in NESW direction. Moreover, the principal axes of strains show a good correlation with the directions obtained from earthquake focal mechanisms.