How new fault data and models affect seismic hazard results? Examples from southeast Spain

Gaspar Escribano, Jorge M. and Benito Oterino, Belen and Staller Vázquez, Alejandra and Ruiz Barajas, Sandra and Quirós, Ligia Elena (2016). How new fault data and models affect seismic hazard results? Examples from southeast Spain. In: "EGU General Assembly 2016", 17–22 Abril 2016.

Description

Title: How new fault data and models affect seismic hazard results? Examples from southeast Spain
Author/s:
  • Gaspar Escribano, Jorge M.
  • Benito Oterino, Belen
  • Staller Vázquez, Alejandra
  • Ruiz Barajas, Sandra
  • Quirós, Ligia Elena
Item Type: Presentation at Congress or Conference (Poster)
Event Title: EGU General Assembly 2016
Event Dates: 17–22 Abril 2016
Title of Book: Geophysical Research Abstracts
Date: 18 April 2016
Subjects:
Faculty: E.T.S.I. en Topografía, Geodesia y Cartografía (UPM)
Department: Ingeniería Cartográfica y Topografía
Creative Commons Licenses: Recognition

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Abstract

In this work, we study the impact of different approaches to incorporate faults in a seismic hazard assessment analysis. Firstly, we consider two different methods to distribute the seismicity of the study area into faults and area-sources, based on magnitude partitioning and on moment rate distribution. We use two recurrence models to characterize fault activity: the characteristic earthquake model and the modified Gutenberg-Richter exponential frequency-magnitude distribution. An application of the work is developed in the region of Murcia (southeastern Spain), due to the availability of fault data and because is one of the areas in Spain with higher seismic hazard. The parameters used to model fault sources are derived from paleoseismological and field studies obtained from the literature and online repositories. Additionally, for some significant faults only, geodetically-derived slip rates are used to compute recurrence periods. The results of all the seismic hazard computations carried out using different models and data are represented in maps of expected peak ground accelerations for a return period of 475 years. Maps of coefficients of variation are presented to constraint the variability of the end-results to different input models and values. Additionally, the different hazard maps obtained in this study are compared with the seismic hazard maps obtained in previous work for the entire Spanish territory and more specifically for the region of Murcia. This work is developed in the context of the MERISUR project (ref. CGL2013-40492-R), with funding from the Spanish Ministry of Economy and Competitiveness.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainCGL2013-40492-RMERISURJorge Miguel Gaspar EscribanoMetodología para la Evaluación Efectiva del Riesgo Sísmico Urbano

More information

Item ID: 49785
DC Identifier: http://oa.upm.es/49785/
OAI Identifier: oai:oa.upm.es:49785
Deposited by: Dr Jorge Gaspar Escribano
Deposited on: 16 Mar 2018 07:50
Last Modified: 16 Mar 2018 07:50
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