Author:
Glehman Jonatan,Tsesarsky Michael
Abstract
Abstract. In Israel, due to low seismicity rates and a sparse seismic
network, the temporal and spatial coverage of ground motion data is
insufficient to estimate the variability in moderate–strong (M>6) ground motions required to construct a local ground motion model (GMM).
To fill this data gap and to study the ground motion variability in M>6 events, we performed a series of 3-D numerical simulations of
M 6 and M 7 earthquakes. Based on the results of the simulations, we
developed a parametric attenuation model (AM) and studied the residuals
between simulated and AM peak ground velocities (PGVs) and the single station variability. We also
compared the simulated ground motions with a global GMM in terms of PGV and significant duration (Ds 595). Our results
suggested that the AM was unable to fully capture the simulated ground
motion variability mainly due to the incorporation of super-shear rupture
and effects of local sedimentary structures. We also showed that an imported
GMM considerably deviates from simulated ground motions. This work sets the
basis for future development of a comprehensive GMM for Israel, accounting
for local source, path, and site effects.
Funder
Ministry of Energy, Israel
Subject
General Earth and Planetary Sciences