This study demonstrates the importance of incorporating local soil response when the goal is to model hazard at the urban scale with a higher level of detail compared to more standard approaches using Vs30. It contains the description of the methods used and final urban hazard results for the TREQ cities.

This document describes the hazard calculations that were performed for rock and soil conditions using the OpenQuake Engine (Pagani et al. 2014), on a grid covering the city (1km spaced) and for 10% and 2% in 50 years probabilities of exceedance (PoE). Several structural periods (i.e. peak ground acceleration and spectral acceleration at 0.2, 0.5, 1.0 and 2.0 seconds) were considered. Uniform hazard spectra (UHS) were derived using these spectral periods for the PoE considered. In addition, disaggregation analysis was performed for each city in order to understand which sources contribute most to the hazard computed for rock condition for each city.

This document describes the development of a national PSHA model for the Dominican Republic in five sections: 1) seismotectonics; 2) major datasets that were used to build the model; 3) seismic source characterization, including the analyses performed to validate the model components; 4) seismic attenuation properties of Hispaniola and the ground motion model logic tree that was selected for the Dominican Republic; and 5) main seismic hazard results computed from the model using the OpenQuake Engine, focusing mostly on the city of Santiago de los Caballeros. The last section discusses how the results compare to those of former models, and thus how this study has changed our understanding of seismic hazard in the Dominican Republic.