Resumen

POZOS-ESTRADA, Adrián; GOMEZ MARTINEZ, Roberto  y  HONG, Hanping. Seismic hazard deaggregation for some selected sites of Mexico. Ing. sísm [online]. 2014, n.91, pp.31-53. ISSN 0185-092X.

We describe the deaggregation of seismic hazard based on a model applicable to a region of the Pacific coast of Mexico, taking into account the seismic source zones, the recurrence model, and the attenuation relations. We also developed attenuation relations for Mexico City (i.e., the recording station of CU) and integrated them in the adopted seismic hazard model. We provide contour maps of the seismic hazard for the Pacific coast of Mexico, and uniform hazard spectra for some selected sites, including the CU station; we noted that the ordinates of the design spectrum for Mexico City are greater than those for the uniform hazard spectrum for a return period of 125 years. The seismic scenarios identified show that, on occasion, the contribution to the seismic hazard for a return period of 125 or 475 years is dominated by a single event and in other cases the seismic hazard is due to different seismic scenarios and earthquake types; in particular for the CU station, it is observed that for a vibration period less than about 0.7 (s) the seismic hazard is dominated for inslab events and that interplate events dominate the seismic hazard for vibration periods greater than that. For the Pacific coast, the seismic hazard is dominated by interplate earthquakes, and by intraslab and interplate events for zones away from the coast.

Palabras llave : seismic deaggregation; uniform hazard spectra; interplate earthquakes; inslab earthquakes.

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