caa a22 4500 463172051 CHVBK 20180406164816.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10950-006-9025-z doi (NATIONALLICENCE)springer-10.1007/s10950-006-9025-z Normal faulting mechanisms in the Western Desert of Egypt [Elektronische Daten] [Ali Abdel-Fattah, Ahmed Badawy, K. Kim] Egypt is recognized as a moderate seismicity region where earthquakes are distributed within several active regions. Owing to sparse distribution of both seismicity and seismic stations, mostly moderate-size Egyptian earthquakes were recorded by regional stations. One of such cases is the moderate-size earthquakes of moment magnitudes greater than 4.0 which struck the Western Desert of Egypt in 1998 and 1999. These events are the first instrumentally recorded earthquakes occurring in the area. In the present study, the source mechanism for these earthquakes was estimated using the waveform data recorded from one of the very broadband MedNet seismograph stations and polarities from the national short-period seismographs. An iterative technique was applied to find the best-fit double-couple mechanism by a grid search over strike, dip and rake. Regional synthetic seismograms were calculated by using f-k integration in the frequency range of 0.03-0.1Hz. A crustal structure fitted to surface wave dispersion curves was used to compute Green's function. Focal depths were determined through the grid search method for a range of source depths. Our results show a normal faulting mechanism with minor strike-slip component. The NNW trend has been chosen as a preferred rupture plane in consistence with surface and subsurface faults and microearthquake seismicity in the epicenteral area as well. Springer Science+Business Media, Inc., 2006 grid search method nationallicence moment magnitude nationallicence relocation nationallicence seismic moment nationallicence source mechanism nationallicence Western Desert nationallicence Egypt nationallicence Abdel-Fattah Ali National Research Institute of Astronomy and Geophysics, 11421, Cairo, Helwan, Egypt aut Badawy Ahmed National Research Institute of Astronomy and Geophysics, 11421, Cairo, Helwan, Egypt aut Kim K. Kangwon National University, 192-1 Hyoja-2-dong, 200-701, Chunchon, Kangwon-do, South Korea aut Journal of Seismology Kluwer Academic Publishers 11/1(2007-01-01), 27-38 1383-4649 11:1<27 2007 11 10950 https://doi.org/10.1007/s10950-006-9025-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10950-006-9025-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abdel-Fattah Ali National Research Institute of Astronomy and Geophysics, 11421, Cairo, Helwan, Egypt aut NATIONALLICENCE 700 1- Badawy Ahmed National Research Institute of Astronomy and Geophysics, 11421, Cairo, Helwan, Egypt aut NATIONALLICENCE 700 1- Kim K. Kangwon National University, 192-1 Hyoja-2-dong, 200-701, Chunchon, Kangwon-do, South Korea aut NATIONALLICENCE 773 0- Journal of Seismology Kluwer Academic Publishers 11/1(2007-01-01), 27-38 1383-4649 11:1<27 2007 11 10950 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer