M. Abdelazim Abdalla Metwally¹ , H. Hussein¹ , M. ElGabry¹

¹National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Egypt

Abstract:

The focal mechanisms of earthquakes in and around Egypt are calculated for the period 2004 -2016 using the waveform data recorded by the Egyptian National Seismological Network (ENSN) and the International Data Centre (IDC) of the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO). These solutions are computed by joining P, S_H, S_V polarities and S_V/P, S_H/P and S_V/S_H amplitude ratios where the quality of each solution is evaluated. This set of solutions is considered as a completion of the Egyptian focal mechanism catalogue. This catalogue will be helpful in understanding the temporal changes in the stress field and as one of methods for discrimination between explosions and natural events.