Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador

ABSTRACT Few moderate-to-strong earthquakes associated with active and capable geological faults have been documented for the southern coastal region of Ecuador. The seismic record of Ecuador initiates with the Guayaquil earthquake in 1787 (Mw 6.5), followed by the 1943 (Mw 6.2), and the most recent...

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Autores principales:	Chunga,Kervin, Ochoa-Cornejo,Felipe, Mulas,Maurizio, Toulkeridis,Theofilos, Menéndez,Edgar
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2019
Materias:	Capable fault Crustal earthquake Estimated magnitudes Guayaquil Gulf
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000100066
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spelling	oai:scielo:S0718-710620190001000662019-02-18Characterization of seismogenic crustal faults in the Gulf of Guayaquil, EcuadorChunga,KervinOchoa-Cornejo,FelipeMulas,MaurizioToulkeridis,TheofilosMenéndez,Edgar Capable fault Crustal earthquake Estimated magnitudes Guayaquil Gulf ABSTRACT Few moderate-to-strong earthquakes associated with active and capable geological faults have been documented for the southern coastal region of Ecuador. The seismic record of Ecuador initiates with the Guayaquil earthquake in 1787 (Mw 6.5), followed by the 1943 (Mw 6.2), and the most recent one in 1980 (Mw 6.1). The available data is insufficient to evaluate the seismic hazards associated with faults capable of generating seismic events of magnitude Mw≥6.0 in the region. Also, earthquakes of minor magnitudes can be disregarded as they do not induce significant ground coseismic effects. In this context, this study presents a catalog of geological faults, delineating 40 segments of capable and active faults on the sea floor of the Gulf of Guayaquil and inland segments of Guayas, Santa Elena, and El Oro provinces. This methodological approach estimates a variety of seismicity levels ranging between Mw 6.2 and Mw 7.2, with rock peak ground accelerations between 0.24 g and 0.41 g. These values have been obtained from empirical regression equations applied to the length of capable geological faults. The F-40 seismogenic structure located in the accretionary prism, close to the subduction zone, is capable of generating Mw 8.2 earthquakes and potentially causing coseismic ground damage to the city of Guayaquil located ca. 177 km to the NE. Furthermore, local tsunami hazards may affect severely areas that are densely populated, with developing industrial areas, on the coast of the Gulf of Guayaquil. This structural geological analysis provides useful new data for seismic hazard assessment.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.46 n.1 20192019-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000100066en10.5027/andgeov46n1-2991
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Capable fault Crustal earthquake Estimated magnitudes Guayaquil Gulf
spellingShingle	Capable fault Crustal earthquake Estimated magnitudes Guayaquil Gulf Chunga,Kervin Ochoa-Cornejo,Felipe Mulas,Maurizio Toulkeridis,Theofilos Menéndez,Edgar Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador
description	ABSTRACT Few moderate-to-strong earthquakes associated with active and capable geological faults have been documented for the southern coastal region of Ecuador. The seismic record of Ecuador initiates with the Guayaquil earthquake in 1787 (Mw 6.5), followed by the 1943 (Mw 6.2), and the most recent one in 1980 (Mw 6.1). The available data is insufficient to evaluate the seismic hazards associated with faults capable of generating seismic events of magnitude Mw≥6.0 in the region. Also, earthquakes of minor magnitudes can be disregarded as they do not induce significant ground coseismic effects. In this context, this study presents a catalog of geological faults, delineating 40 segments of capable and active faults on the sea floor of the Gulf of Guayaquil and inland segments of Guayas, Santa Elena, and El Oro provinces. This methodological approach estimates a variety of seismicity levels ranging between Mw 6.2 and Mw 7.2, with rock peak ground accelerations between 0.24 g and 0.41 g. These values have been obtained from empirical regression equations applied to the length of capable geological faults. The F-40 seismogenic structure located in the accretionary prism, close to the subduction zone, is capable of generating Mw 8.2 earthquakes and potentially causing coseismic ground damage to the city of Guayaquil located ca. 177 km to the NE. Furthermore, local tsunami hazards may affect severely areas that are densely populated, with developing industrial areas, on the coast of the Gulf of Guayaquil. This structural geological analysis provides useful new data for seismic hazard assessment.
author	Chunga,Kervin Ochoa-Cornejo,Felipe Mulas,Maurizio Toulkeridis,Theofilos Menéndez,Edgar
author_facet	Chunga,Kervin Ochoa-Cornejo,Felipe Mulas,Maurizio Toulkeridis,Theofilos Menéndez,Edgar
author_sort	Chunga,Kervin
title	Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador
title_short	Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador
title_full	Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador
title_fullStr	Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador
title_full_unstemmed	Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador
title_sort	characterization of seismogenic crustal faults in the gulf of guayaquil, ecuador
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000100066
work_keys_str_mv	AT chungakervin characterizationofseismogeniccrustalfaultsinthegulfofguayaquilecuador AT ochoacornejofelipe characterizationofseismogeniccrustalfaultsinthegulfofguayaquilecuador AT mulasmaurizio characterizationofseismogeniccrustalfaultsinthegulfofguayaquilecuador AT toulkeridistheofilos characterizationofseismogeniccrustalfaultsinthegulfofguayaquilecuador AT menendezedgar characterizationofseismogeniccrustalfaultsinthegulfofguayaquilecuador
_version_	1714205860281974784

Characterization of seismogenic crustal faults in the Gulf of Guayaquil, Ecuador

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