Earthquake modeling in the Dead Sea Basin

Details Earthquake modeling in the Dead Sea Basin Earthquake modeling in the Dead Sea Basin

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29l...8g&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 12, pp. 8-1, CiteID 1567, DOI 10.1029/2001GL013800

Physics

Geophysics

2

Seismology: Earthquake Ground Motions And Engineering, Seismology: Seismic Hazard Assessment And Prediction, Mathematical Geophysics: Modeling

Scientific paper

We simulate 75 seconds of 1.5 Hz wave-propagation of the 1927 Jericho earthquake (ML 6.2) using a staggered-grid finite-difference (FD) method. From the time histories we compute peak ground velocities and pseudo-acceleration responses at 1 Hz in a 3D model including the Dead Sea Basin substructure. We compare the accelerations to values computed (a) for a homogeneous model and (b) using an attenuation relation similar to the one integrated in the building code 413 of Israel. With accelerations at 1 Hz, we show that the Dead Sea Basin substructure is responsible for a significant radiation anisotropy in ground motion attenuation when the source is located within the basin. Rupture dynamics effects of strike-slip events along faults bounding the basin enhance this behaviour. We show that both, the homogeneous model and the attenuation relation, underestimate the spectral responses on average by factors between 1.5 and 5.

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