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Geodynamic Modelling of the Movement Along the Seiyal Fault, Aswan, Egypt
Abstract The study of recent crustal movements along the Sciyal fault is one of the extensive studies carried out in the Aswan region after the November 14, 1981 earthquake (M=5.5). In 1988, a local geodetic network of 20 points was established covering an area of about 100 $ km^{2} $ around the active part of the Sciyal fault for monitoring lateral movements, to predict the possible earthquake activity and to understand the geodynamics of the area. The initial horizontal measurements were carried out in March 1989 and have been repeated twice a year. Six horizontal geodetic measurements were analysed. The results revealed remarkable horizontal changes during the period of measurement and led to estimation of the stress and strain fields which were calculated for the different epochs of measurements. Also, the results show a cyclic rigid body motion of the north side versus the south side of the fault in a general E-W direction. The direction of the motion agrees with the direction of compressive force. For the different epochs of geodetic measurements, the magnitudes of movements along the Sciyal fault are around 0.5 mm per year.
Geodynamic Modelling of the Movement Along the Seiyal Fault, Aswan, Egypt
Abstract The study of recent crustal movements along the Sciyal fault is one of the extensive studies carried out in the Aswan region after the November 14, 1981 earthquake (M=5.5). In 1988, a local geodetic network of 20 points was established covering an area of about 100 $ km^{2} $ around the active part of the Sciyal fault for monitoring lateral movements, to predict the possible earthquake activity and to understand the geodynamics of the area. The initial horizontal measurements were carried out in March 1989 and have been repeated twice a year. Six horizontal geodetic measurements were analysed. The results revealed remarkable horizontal changes during the period of measurement and led to estimation of the stress and strain fields which were calculated for the different epochs of measurements. Also, the results show a cyclic rigid body motion of the north side versus the south side of the fault in a general E-W direction. The direction of the motion agrees with the direction of compressive force. For the different epochs of geodetic measurements, the magnitudes of movements along the Sciyal fault are around 0.5 mm per year.
Geodynamic Modelling of the Movement Along the Seiyal Fault, Aswan, Egypt
Mohamed, Abd El-Monem S. (author)
1999
Article (Journal)
English
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