Updated probabilistic seismic-hazard values for Egypt

Seismic hazard in terms of mean peak ground acceleration (PGA) and spectral acceleration (SA) values has been computed for Egypt using both historical and instrumental earthquake data. For this purpose, an updated earthquake catalog, spanning the time period from 2200 B.C. to 2013, has been compiled...

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Autores: Sawires, R., Peláez, J.A., Fat-Helbary, R.E., Ibrahim, H.A.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Universidad de Jaén
Repositorio:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
OAI Identifier:oai:ruja.ujaen.es:10953/6885
Acceso en línea:https://doi.org/10.1785/0120150218
https://hdl.handle.net/10953/6885
Access Level:acceso abierto
Palabra clave:Seismic hazard
Egypt
Uniform hazard specta
Logic tree
55
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repository_id_str
spelling Updated probabilistic seismic-hazard values for EgyptSawires, R.Peláez, J.A.Fat-Helbary, R.E.Ibrahim, H.A.Seismic hazardEgyptUniform hazard spectaLogic tree55Seismic hazard in terms of mean peak ground acceleration (PGA) and spectral acceleration (SA) values has been computed for Egypt using both historical and instrumental earthquake data. For this purpose, an updated earthquake catalog, spanning the time period from 2200 B.C. to 2013, has been compiled for Egypt as well as its surrounding regions and is prepared to be used in a new probabilistic seismic‐hazard assessment of Egypt. The earthquakes sizes were unified in terms of the moment magnitude scale. A new seismic source model for the seismic activity in and around Egypt, consisting of a total of 88 seismic zones (for shallow‐ and intermediate‐depth seismicity), was considered in this new assessment. The seismicity parameters have been specifically computed for 35 seismic sources covering the Egyptian territory and the Eastern Mediterranean region. A logic‐tree design was set up to consider the epistemic uncertainty in the Gutenberg–Richter b‐value, maximum possible magnitude (Mmax), and the selected ground‐motion prediction equations. Seismic‐hazard computations for rock‐site conditions with 10% and 5% probability of exceedance in 50 years were carried out. In addition, uniform hazard spectra for twelve, among the most important and populated cities in Egypt, are computed and compared with the most recent Egyptian building code values. It is interesting to highlight that the maximum hazard values are observed at the Gulf of Aqaba region, specifically around the epicentral location of the biggest Egyptian recorded earthquake of 22 November 1995 (Mw 7.2) Aqaba earthquake. The obtained seismic‐hazard values for Nuweiba city (located in this region) for mean PGA and SA (0.1 s) are 0.29g and 0.74g, respectively, for a return period of 475 years.This research work was supported by the Egyptian Ministry of Higher Education (Cultural Affairs and Missions Sector, Cairo) and the Spanish Seismic Hazard and Active Tectonics research group.Seismological Society of America202620262016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://doi.org/10.1785/0120150218https://hdl.handle.net/10953/6885reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaéninstname:Universidad de JaénInglésBulletin of the Seismological Society of AmericaCC0 1.0 Universalhttp://creativecommons.org/publicdomain/zero/1.0/info:eu-repo/semantics/openAccessoai:ruja.ujaen.es:10953/68852026-06-24T12:41:07Z
dc.title.none.fl_str_mv Updated probabilistic seismic-hazard values for Egypt
title Updated probabilistic seismic-hazard values for Egypt
spellingShingle Updated probabilistic seismic-hazard values for Egypt
Sawires, R.
Seismic hazard
Egypt
Uniform hazard specta
Logic tree
55
title_short Updated probabilistic seismic-hazard values for Egypt
title_full Updated probabilistic seismic-hazard values for Egypt
title_fullStr Updated probabilistic seismic-hazard values for Egypt
title_full_unstemmed Updated probabilistic seismic-hazard values for Egypt
title_sort Updated probabilistic seismic-hazard values for Egypt
dc.creator.none.fl_str_mv Sawires, R.
Peláez, J.A.
Fat-Helbary, R.E.
Ibrahim, H.A.
author Sawires, R.
author_facet Sawires, R.
Peláez, J.A.
Fat-Helbary, R.E.
Ibrahim, H.A.
author_role author
author2 Peláez, J.A.
Fat-Helbary, R.E.
Ibrahim, H.A.
author2_role author
author
author
dc.subject.none.fl_str_mv Seismic hazard
Egypt
Uniform hazard specta
Logic tree
55
topic Seismic hazard
Egypt
Uniform hazard specta
Logic tree
55
description Seismic hazard in terms of mean peak ground acceleration (PGA) and spectral acceleration (SA) values has been computed for Egypt using both historical and instrumental earthquake data. For this purpose, an updated earthquake catalog, spanning the time period from 2200 B.C. to 2013, has been compiled for Egypt as well as its surrounding regions and is prepared to be used in a new probabilistic seismic‐hazard assessment of Egypt. The earthquakes sizes were unified in terms of the moment magnitude scale. A new seismic source model for the seismic activity in and around Egypt, consisting of a total of 88 seismic zones (for shallow‐ and intermediate‐depth seismicity), was considered in this new assessment. The seismicity parameters have been specifically computed for 35 seismic sources covering the Egyptian territory and the Eastern Mediterranean region. A logic‐tree design was set up to consider the epistemic uncertainty in the Gutenberg–Richter b‐value, maximum possible magnitude (Mmax), and the selected ground‐motion prediction equations. Seismic‐hazard computations for rock‐site conditions with 10% and 5% probability of exceedance in 50 years were carried out. In addition, uniform hazard spectra for twelve, among the most important and populated cities in Egypt, are computed and compared with the most recent Egyptian building code values. It is interesting to highlight that the maximum hazard values are observed at the Gulf of Aqaba region, specifically around the epicentral location of the biggest Egyptian recorded earthquake of 22 November 1995 (Mw 7.2) Aqaba earthquake. The obtained seismic‐hazard values for Nuweiba city (located in this region) for mean PGA and SA (0.1 s) are 0.29g and 0.74g, respectively, for a return period of 475 years.
publishDate 2016
dc.date.none.fl_str_mv 2016
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/10.1785/0120150218
https://hdl.handle.net/10953/6885
url https://doi.org/10.1785/0120150218
https://hdl.handle.net/10953/6885
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Bulletin of the Seismological Society of America
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 Seismological Society of America
publisher.none.fl_str_mv Seismological Society of America
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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