← Back to Sessions

WITHDRAWN Probabilistic Analysis of Seismic Hazard in the Dominican Republic Considering Hybrid Models of Zones and Faults and Including the Local Effect on the Expected Motion.

Description: 

WITHDRAWN A recent seismic hazard study has been carried out in the Dominican Republic, modeling the main faults as independent seismic sources and using a hybrid probabilistic methodology that combines zones and faults. In this way, maps of the expected motion in terms of peak ground acceleration and spectral accelerations SA(T) on rock sites have been obtained for a return period of 475 years, resulting in notably higher accelerations in the area of the faults than those obtained by only zoned methods. This result is consistent with the near-fault effect that is observed in the records of many earthquakes and that is also contemplated in some seismic codes.
On the other hand, a study of microzonation in urban areas of Santo Domingo and Santiago de los Caballeros cities has been developed, based on data obtained in a campaign of urban noise recording, processed with different techniques in order to extract valuable information about the fundamental frequency and geological shallow structure Vs30.
Integrating the results of the two previous studies, the expected motions in the two cities have been estimated, including the local effect, finding the distributions of PGA and SA(T) for the mentioned return period, which represent the accelerations with a probability of exceedance of 10%. in 50 years. The main value of these maps is that they integrate both the fault proximity effect and the site effect, in a probabilistic approach, providing data of interest to check the corresponding Source and Soil factors of the seismic codes.
The work has been developed within the framework of three research projects: “KUK ÀHPÁN: Integrated Regional Study of Structure and Evolution 4D of the Lithosphere in Central America”. Implications in the Calculation of Seismic Hazard and Risk” ; “ MICROSIS-I : seismic microzoning in urban areas of the Dominican Republic, based on active and passive” and “Evaluation of the seismic hazard of Hispaniola island and the seismic risk in populations of the Dominican Republic”.

Session: Advances in Probabilistic Seismic Hazard Analysis and Applications

Type: Oral

Date: 4/19/2023

Presentation Time: 08:45 AM (local time)

Presenting Author: Claudia Germoso

Student Presenter: No

Invited Presentation: 

Authors