TY  - JOUR
A1  - Bora, Sanjay Singh
A1  - Cotton, Fabrice
A1  - Scherbaum, Frank
A1  - Edwards, Benjamin
A1  - Traversa, Paola
T1  - Stochastic source, path and site attenuation parameters and associated variabilities for shallow crustal European earthquakes
JF  - Bulletin of earthquake engineering : official publication of the European Association for Earthquake Engineering
N2  - We have analyzed the recently developed pan-European strong motion database, RESORCE-2012: spectral parameters, such as stress drop (stress parameter, Delta sigma), anelastic attenuation (Q), near surface attenuation (kappa(0)) and site amplification have been estimated from observed strong motion recordings. The selected dataset exhibits a bilinear distance-dependent Q model with average kappa(0) value 0.0308 s. Strong regional variations in inelastic attenuation were also observed: frequency-independent Q(0) of 1462 and 601 were estimated for Turkish and Italian data respectively. Due to the strong coupling between Q and kappa(0), the regional variations in Q have strong impact on the estimation of near surface attenuation kappa(0). kappa(0) was estimated as 0.0457 and 0.0261 s for Turkey and Italy respectively. Furthermore, a detailed analysis of the variability in estimated kappa(0) revealed significant within-station variability. The linear site amplification factors were constrained from residual analysis at each station and site-class type. Using the regional Q(0) model and a site-class specific kappa(0), seismic moments (M-0) and source corner frequencies f (c) were estimated from the site corrected empirical Fourier spectra. Delta sigma did not exhibit magnitude dependence. The median Delta sigma value was obtained as 5.75 and 5.65 MPa from inverted and database magnitudes respectively. A comparison of response spectra from the stochastic model (derived herein) with that from (regional) ground motion prediction equations (GMPEs) suggests that the presented seismological parameters can be used to represent the corresponding seismological attributes of the regional GMPEs in a host-to-target adjustment framework. The analysis presented herein can be considered as an update of that undertaken for the previous Euro-Mediterranean strong motion database presented by Edwards and Fah (Geophys J Int 194(2):1190-1202, 2013a).
KW  - Stochastic model
KW  - Attenuation
KW  - Stress parameter
KW  - Kappa
KW  - Crustal earthquakes
Y1  - 2017
U6  - https://doi.org/10.1007/s10518-017-0167-x
SN  - 1570-761X
SN  - 1573-1456
VL  - 15
SP  - 4531
EP  - 4561
PB  - Springer
CY  - Dordrecht
ER  -