EARTHQUAKE OF THE 27TH OF OCTOBER 2013 OF KALABSHA, ASWAN AREA, SOUTHERN EGYPT | ||
| Journal of Egyptian Geophysical Society | ||
| Volume 13, Issue 1, 2015, Pages 103-113 PDF (1.85 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jegs.2015.385039 | ||
| Authors | ||
| K. Omar; G.E.A. Mohamed | ||
| Seismology Department (E-mail: khaled.yosif@yahoo.com) National Research Institute of Astronomy and Geophysics (NRIAG) 11421- Helwan, Cairo, Egypt. | ||
| Abstract | ||
| On Sunday October 27, 2013 at 13:21:15 (GMT) an earthquake of ML 3.9 occurred west Lake Nasser, Aswan and followed with an earthquake on Monday October 28, 2013 at 08:39:19 (GMT) with ML 2.7. Both are located at Aswan area. Moment tensor inversions of the two events reveal strike-slip mechanism with considerable normal faulting component. Derived focal mechanism of the first and of the second using polarities of P wave shows strike-slip fault with minor movement of normal type. The solutions gave two nodal planes trending N–S, E-W in close agreement with the surface traces of the faults crossing the area. The movement is right lateral along the first plane while left lateral along the second one. The source parameters were estimated and seismic moment was found to be 6.18E+20 dyne.cm for the first and 1.95E+19 dyne.cm for the second event. This corresponds to a moment magnitude Mw 3.1 and 2.1 respectively. Following Brune model, the source radius is 98.73 and 99.79 m, stress drop was 0.003 and 0.0008 MPa and seismic energy released is 3.09E+16 for first event and 9.74E+14 for the second event. The source mechanism from the fault plane solution shows a normal fault with considerable strike-slip component. | ||
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