Strong ground-motion relations for Mexican interplate earthquakes
Por:
Arroyo D., García D., Ordaz M., Mora M.A., Singh S.K.
Publicada:
1 oct 2010
Resumen:
We derive strong ground-motion relations for horizontal components of pseudo-acceleration response spectra from Mexican interplate earthquakes at rock sites (NEHRP B class) in the forearc region. The functional form is obtained from the analytical solution of a circular finite-source model. For the regression analysis we use a recently proposed multivariate Bayesian technique. The resulting model has similar accuracy as those models derived from regional and worldwide subduction-zone databases. However, there are significant differences in the estimations computed from our model and other models. First, our results reveal that attenuation in Mexico tends to be stronger than that of worldwide relations, especially for large events. Second, our model predicts ground motions for large earthquakes at close distances to the source that are considerably larger than the estimations of global models. Lack of data in this range makes it difficult to identify the most appropriate model for this
Filiaciones:
Arroyo D.:
Departamento de Materiales, Universidad Autónoma Metropolitana, Azcapotzalco, Mexico DF, Mexico
García D.:
Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, Mexico
Instituto de Geofísica, UNAM, México DF, Mexico
Ordaz M.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City, DF, Mexico
Instituto de Ingeniería, UNAM, Mexico DF, Mexico
Mora M.A.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City, DF, Mexico
Instituto de Ingeniería, UNAM, Mexico DF, Mexico
Singh S.K.:
Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, Mexico
Instituto de Geofísica, UNAM, México DF, Mexico
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