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Review of Hybrid Methods for the Characterization of Seismic Hazard in Central America

Description: 

The introduction of faults as independent seismic sources in hazard assessment has a great impact on the results, with respect to those obtained with classical zoning methods (CZM) in probabilistic Seismic Hazard Assessment (PSHA). Currently, some approaches that have used hybrid models (HM) composed of zone-type sources and fault-type sources, reveal that expected ground motion values around main faults may double (on average) those obtained by zoned models, in agreement with observations in recent earthquakes (Rivas-Medina, A., 2018; Gómez-Novell O., 2020). This fact has a great impact on the hazard and seismic risk results that can be obtained in populations close to active faults.
This presentation compares some methods that address two key aspects: how to quantify the geological information and transfer it to recurrence models, and how to distribute the seismic potential between the two types of sources. These methos are: 1) Moment rate method proposed by Bungum (2007), 2) Slip-rate method proposed also by Bungum (2007) ,3) Hybrid method developed by Rivas-Medina et al. (2018) and 4) the method to build hazard models including earthquake ruptures involving several faults (SHERIFS) by Chartier et al. (2019). This study is centered in all Central America region, which is a moderate to high seismicity region.

Session: Opportunities and Challenges in Source Modeling for Seismic Hazard Analysis [Poster]

Type: Poster

Date: 4/20/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: María Belén Benito Oterino

Student Presenter: Yes

Invited Presentation: 

Authors