Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt

A comparative analysis of geodetic versus seismic moment-rate estimations makes it possible to distinguish between seismic and aseismic deformation, define the style of deformation, and also to reveal potential seismic gaps. This analysis has been performed for Egypt where the present-day tectonics...

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Autores: Sawires, R., Peláez, J.A., Sparacino, F., Radwan, A.M., Rashwan, M., Palano, M.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Recursos:Universidad de Jaén
Repositorio:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
OAI Identifier:oai:ruja.ujaen.es:10953/6873
Acesso em linha:https://doi.org/10.3390/app11177836
https://hdl.handle.net/10953/6873
Access Level:acceso abierto
Palavra-chave:Seismicity
GNSS data
Seismic and aseismic deformation
Seismic hazard
Moment-rates
Gulf of Aqaba
Gulf of Suez
Red Sea
Egypt
55
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spelling Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of EgyptSawires, R.Peláez, J.A.Sparacino, F.Radwan, A.M.Rashwan, M.Palano, M.SeismicityGNSS dataSeismic and aseismic deformationSeismic hazardMoment-ratesGulf of AqabaGulf of SuezRed SeaEgypt55A comparative analysis of geodetic versus seismic moment-rate estimations makes it possible to distinguish between seismic and aseismic deformation, define the style of deformation, and also to reveal potential seismic gaps. This analysis has been performed for Egypt where the present-day tectonics and seismicity result from the long-lasting interaction between the Nubian, Eurasian, and Arabian plates. The data used comprises all available geological and tectonic information, an updated Poissonian earthquake catalog (2200 B.C.–2020 A.D.) including historical and instrumental datasets, a focal-mechanism solutions catalog (1951–2019), and crustal geodetic strains from Global Navigation Satellite System (GNSS) data. The studied region was divided into ten (EG-01 to EG-10) crustal seismic sources based mainly on seismicity, focal mechanisms, and geodetic strain characteristics. The delimited seismic sources cover the Gulf of Aqaba–Dead Sea Transform Fault system, the Gulf of Suez–Red Sea Rift, besides some potential seismic active regions along the Nile River and its delta. For each seismic source, the estimation of seismic and geodetic moment-rates has been performed. Although the obtained results cannot be considered to be definitive, among the delimited sources, four of them (EG-05, EG-06, EG-08, and EG-10) are characterized by low seismic-geodetic moment-rate ratios (<20%), reflecting a prevailing aseismic behavior. Intermediate moment-rate ratios (from 20% to 60%) have been obtained in four additional zones (EG-01, EG-04, EG-07, and EG-09), evidencing how the seismicity accounts for a minor to a moderate fraction of the total deformational budget. In the other two sources (EG-02 and EG-03), high seismic-geodetic moment-rates ratios (>60%) have been observed, reflecting a fully seismic deformation.This research has been partially funded in the frame of the Programa Operativo FEDER Andalucía 2014–2020-call made by the University of Jaén, 2018.MDPI202620262021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://doi.org/10.3390/app11177836https://hdl.handle.net/10953/6873reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaéninstname:Universidad de JaénInglésApplied Sciences-BaselCC0 1.0 Universalhttp://creativecommons.org/publicdomain/zero/1.0/info:eu-repo/semantics/openAccessoai:ruja.ujaen.es:10953/68732026-06-24T12:41:07Z
dc.title.none.fl_str_mv Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
title Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
spellingShingle Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
Sawires, R.
Seismicity
GNSS data
Seismic and aseismic deformation
Seismic hazard
Moment-rates
Gulf of Aqaba
Gulf of Suez
Red Sea
Egypt
55
title_short Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
title_full Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
title_fullStr Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
title_full_unstemmed Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
title_sort Seismic and geodetic crustal moment rates comparison: new insights on the seismic hazard of Egypt
dc.creator.none.fl_str_mv Sawires, R.
Peláez, J.A.
Sparacino, F.
Radwan, A.M.
Rashwan, M.
Palano, M.
author Sawires, R.
author_facet Sawires, R.
Peláez, J.A.
Sparacino, F.
Radwan, A.M.
Rashwan, M.
Palano, M.
author_role author
author2 Peláez, J.A.
Sparacino, F.
Radwan, A.M.
Rashwan, M.
Palano, M.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Seismicity
GNSS data
Seismic and aseismic deformation
Seismic hazard
Moment-rates
Gulf of Aqaba
Gulf of Suez
Red Sea
Egypt
55
topic Seismicity
GNSS data
Seismic and aseismic deformation
Seismic hazard
Moment-rates
Gulf of Aqaba
Gulf of Suez
Red Sea
Egypt
55
description A comparative analysis of geodetic versus seismic moment-rate estimations makes it possible to distinguish between seismic and aseismic deformation, define the style of deformation, and also to reveal potential seismic gaps. This analysis has been performed for Egypt where the present-day tectonics and seismicity result from the long-lasting interaction between the Nubian, Eurasian, and Arabian plates. The data used comprises all available geological and tectonic information, an updated Poissonian earthquake catalog (2200 B.C.–2020 A.D.) including historical and instrumental datasets, a focal-mechanism solutions catalog (1951–2019), and crustal geodetic strains from Global Navigation Satellite System (GNSS) data. The studied region was divided into ten (EG-01 to EG-10) crustal seismic sources based mainly on seismicity, focal mechanisms, and geodetic strain characteristics. The delimited seismic sources cover the Gulf of Aqaba–Dead Sea Transform Fault system, the Gulf of Suez–Red Sea Rift, besides some potential seismic active regions along the Nile River and its delta. For each seismic source, the estimation of seismic and geodetic moment-rates has been performed. Although the obtained results cannot be considered to be definitive, among the delimited sources, four of them (EG-05, EG-06, EG-08, and EG-10) are characterized by low seismic-geodetic moment-rate ratios (<20%), reflecting a prevailing aseismic behavior. Intermediate moment-rate ratios (from 20% to 60%) have been obtained in four additional zones (EG-01, EG-04, EG-07, and EG-09), evidencing how the seismicity accounts for a minor to a moderate fraction of the total deformational budget. In the other two sources (EG-02 and EG-03), high seismic-geodetic moment-rates ratios (>60%) have been observed, reflecting a fully seismic deformation.
publishDate 2021
dc.date.none.fl_str_mv 2021
2026
2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.3390/app11177836
https://hdl.handle.net/10953/6873
url https://doi.org/10.3390/app11177836
https://hdl.handle.net/10953/6873
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Applied Sciences-Basel
dc.rights.none.fl_str_mv CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
instname:Universidad de Jaén
instname_str Universidad de Jaén
reponame_str RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
collection RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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