Modeling the strong ground motion and rupture characteristics of the March 31, 2006, Darb-e-Astane earthquake, Iran, using a hybrid of near-field SH-wave and empirical Green’s function method

Attenuation characteristics, source parameters and site effects from inversion of S waves of the March 31, 2006 Silakhor aftershocks

“…These values are close to the stress drops reported by Hamzehloo et al [2010] for three events of the Silakhor earthquake that are not included in our database. They obtained a stress drop value of 4.3 MPa for the mainshock (M W 6.1) and 3.2 MPa and 2.8 MPa for the selected foreshock and largest aftershock with M W = 5.1 and 4.9, respectively.…”

“…Hamzehloo et al [2010] applied the SH-wave acceleration spectral data of the 2006 Silakhor earthquake and only one of its foreshock and aftershock to estimate the shear wave quality factor, Q S (f) = 121f 0.55 in the six selected frequency bands from 1 to 24 Hz. Hassani et al (2011) estimated the S-wave quality factor as Q S (f)=151f 0.75 using GIT with a dataset consisting of 40 earthquakes recorded in East-Central Iran for the frequency range 0.4-15 Hz.…”

“…However, considering slight differences between these relations, it should be noted that in these studies different methods have been applied to obtain quality factors implementing various geometrical spreading functions in different frequency ranges sampling different crustal volumes. Furthermore, the study areas of these models are different (except Hamzehloo et al, 2010) and each relation is linked to various seismotectonic provinces of Iran with distinct seismotectonic characteristics [e.g. Mirzaei et al 1998].…”

“…Rahimi et al [2008] estimated the coda Q, Qc, for the Zagros zone by analyzing the coda waves of 51 local earthquakes recorded on three stations of the Iranian National Seismic Network (INSN) with magnitudes ranged from 3.1 to 4.9 during March and April 2006.Most of the analyzed events were foreshocks and aftershocks of the 2006 Silakhor earthquake. Using the SH-wave acceleration spectral data, Hamzehloo et al [2010] estimated the source parameters and frequency dependent shear wave quality factor of the 2006 Silakhor earthquake and only one of its foreshocks and one aftershock that were recorded at 8 stations.…”

Simulation of Ground Motion in the Zagros Region of Iran Using the Specific Barrier Model and the Stochastic Method

“…Previous studies have shown that the local and global stress drops are relatively stable parameters over a wide magnitude range (Halldorsson and Papageorgiou, 2005), so the ensemble average of these values have been determined instead of an event-byevent calibration of the model. There have been some path attenuation models proposed for California earthquakes (Chin and Aki, 1991;Atkinson and Silva, 1997;Silva et al, 1997;Boatwright et al, 2002) and one model proposed for the northwestern Zagros region (Hamzehloo et al, 2010).…”