سال انتشار: ۱۳۹۰

محل انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله

تعداد صفحات: ۸

نویسنده(ها):

Ahmad Raed A. – National Earthquake centre, Damascus, Syria

چکیده:

Although the present day seismicity is low to moderate, there are numerous evidences of earthquake damage along the Dead Sea fault in Syria. In order to estimate the parameters to characterize the seismic hazard, we have used 8 seismic zones as active zones based on tectonic framework and spatial distribution of the seismic activity. In this work, we have used the probabilistic approach of Poisson occurrence model, a number of four disaggregation distance methods: Jonyer-boore, epi-central, focal, and closest to rupture area, in order to perform the seismic hazard computations. Rupture radius (R in km) calculated using constants of K1 and K2 for each fault type in each seismic source area. From an actualized seismic data catalog (1995- 2009) and historical records (19-1995) we assessed the modified Gutenberg-Richter Model parameters and the maximum credible earthquake magnitude for each seismic zone. In order to get more accurate results we have taken an increment of 0.1 x 0.1 degree for the whole area of Syria during seismic hazard computation process. Seven total numbers of spectral ordinates are used for structural period (0.005, 0.2, 0.3, 0.5, 1, 2, and 3 seconds). Here we present the obtained results at spectral periods of 0.2 and 1.0 seconds only. Finally, the seismic hazard maps of Syria are produced.