Spatial variability of the b-value and seismic potential in Costa Rica

Costa Rica is a seismically active region located in a subduction zone. Combining earthquake data from the National Seismological Network and several Central American catalogs from 1522 to 2020, we present a new estimation for the Gutenberg-Richter relationship. The seismic catalog compiled with ~12...

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Detalles Bibliográficos
Autores: Arroyo Solórzano, Mario, Linkimer Abarca, Lepolt
Tipo de recurso: artículo
Fecha de publicación:2021
País:Costa Rica
Institución:Universidad de Costa Rica
Repositorio:Kérwá
Idioma:inglés
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/83770
Acceso en línea:https://www.sciencedirect.com/science/article/pii/S004019512100233X?via%3Dihub#!
https://hdl.handle.net/10669/83770
Access Level:acceso embargado
Palabra clave:b-value
Gutenberg-Richter relationship
Earthquake catalog
Magnitude of completeness
Earthquake declustering
Seismic sources
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oai_identifier_str oai:kerwa.ucr.ac.cr:10669/83770
network_acronym_str CR
network_name_str Costa Rica
repository_id_str
dc.title.es_ES.fl_str_mv Spatial variability of the b-value and seismic potential in Costa Rica
title Spatial variability of the b-value and seismic potential in Costa Rica
spellingShingle Spatial variability of the b-value and seismic potential in Costa Rica
Arroyo Solórzano, Mario
b-value
Gutenberg-Richter relationship
Earthquake catalog
Magnitude of completeness
Earthquake declustering
Seismic sources
title_short Spatial variability of the b-value and seismic potential in Costa Rica
title_full Spatial variability of the b-value and seismic potential in Costa Rica
title_fullStr Spatial variability of the b-value and seismic potential in Costa Rica
title_full_unstemmed Spatial variability of the b-value and seismic potential in Costa Rica
title_sort Spatial variability of the b-value and seismic potential in Costa Rica
dc.creator.none.fl_str_mv Arroyo Solórzano, Mario
Linkimer Abarca, Lepolt
author Arroyo Solórzano, Mario
author_facet Arroyo Solórzano, Mario
Linkimer Abarca, Lepolt
author_role author
author2 Linkimer Abarca, Lepolt
author2_role author
dc.subject.es_ES.fl_str_mv b-value
Gutenberg-Richter relationship
Earthquake catalog
Magnitude of completeness
Earthquake declustering
Seismic sources
topic b-value
Gutenberg-Richter relationship
Earthquake catalog
Magnitude of completeness
Earthquake declustering
Seismic sources
description Costa Rica is a seismically active region located in a subduction zone. Combining earthquake data from the National Seismological Network and several Central American catalogs from 1522 to 2020, we present a new estimation for the Gutenberg-Richter relationship. The seismic catalog compiled with ~122,000 earthquakes was studied by calculating the magnitude of completeness (Mc) and by applying a space-time window declustering method. The residual catalog and a previously proposed seismic zonation were used to determine the b-value, the maximum magnitude (Mmax), and the mean recurrence interval (MRI). Our results show a temporal and geographic variation in the Mc, decreasing from 7.0 since 1793 to 3.0 since 1995, and with the lowest estimate (2.5) in Central Costa Rica. The b-values of 0.85 for the entire catalog and ~0.83 for the interplate zones, are similar to other regions worldwide with young subducting slabs. There is a general trend of higher and more variable b-values among the upper-plate (average 0.90) and intraslab (1.14) zones as compared to the interplate regions (0.85). The upper-plate variability is explained in terms of the diversity in geological units and faulting style, whereas in the interplate and the subducting slab is connected to the stress level imposed by different seafloor morphologies and hydration states along the margin. Our data suggest a seismic potential of moment magnitude (Mw) 7.9–8.0 for the Nicoya and Southern Nicaragua interplate zones and for the Limon region. The Gutenberg-Richter distribution shows that a Mw 7.0 has a longer MRI for the intraslab zones (~72 years) than for the subduction interplate region (~15 years) and plate and microplate boundaries (~40–45 years). Interplate earthquakes have occurred recently (1991 Mw 7.7 and 2012 Mw 7.6) but no major intraslab since 1948 (Mw 7.0).
publishDate 2021
dc.date.accessioned.none.fl_str_mv 2021-06-22T20:39:33Z
dc.date.available.none.fl_str_mv 2021-06-22T20:39:33Z
dc.date.issued.none.fl_str_mv 2021-06
dc.type.none.fl_str_mv artículo original
http://purl.org/coar/resource_type/c_2df8fbb1
info:eu-repo/semantics/article
format article
dc.identifier.citation.none.fl_str_mv https://www.sciencedirect.com/science/article/pii/S004019512100233X?via%3Dihub#!
dc.identifier.issn.none.fl_str_mv 0040-1951
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10669/83770
dc.identifier.doi.none.fl_str_mv 10.1016/j.tecto.2021.228951
dc.identifier.codproyecto.none.fl_str_mv 731-B9-780
113-B5-704
113-B9-911
url https://www.sciencedirect.com/science/article/pii/S004019512100233X?via%3Dihub#!
https://hdl.handle.net/10669/83770
identifier_str_mv 0040-1951
10.1016/j.tecto.2021.228951
731-B9-780
113-B5-704
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dc.language.iso.es_ES.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv acceso embargado
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info:eu-repo/semantics/embargoedAccess
rights_invalid_str_mv acceso embargado
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eu_rights_str_mv embargoedAccess
dc.source.es_ES.fl_str_mv Tectonophysics, vol.814, pp.1-18
dc.source.none.fl_str_mv reponame:Kérwá
instname:Universidad de Costa Rica
instacron:UCR
instname_str Universidad de Costa Rica
instacron_str UCR
institution UCR
reponame_str Kérwá
collection Kérwá
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spelling Arroyo Solórzano, Mario75c9e6d3-de67-4fd2-a825-96018f35c607600Linkimer Abarca, Lepolt44a3b21a-cecc-40d9-b7ec-03bd8f99136b6002021-06-22T20:39:33Z2021-06-22T20:39:33Z2021-06https://www.sciencedirect.com/science/article/pii/S004019512100233X?via%3Dihub#!0040-1951https://hdl.handle.net/10669/8377010.1016/j.tecto.2021.228951731-B9-780113-B5-704113-B9-911Costa Rica is a seismically active region located in a subduction zone. Combining earthquake data from the National Seismological Network and several Central American catalogs from 1522 to 2020, we present a new estimation for the Gutenberg-Richter relationship. The seismic catalog compiled with ~122,000 earthquakes was studied by calculating the magnitude of completeness (Mc) and by applying a space-time window declustering method. The residual catalog and a previously proposed seismic zonation were used to determine the b-value, the maximum magnitude (Mmax), and the mean recurrence interval (MRI). Our results show a temporal and geographic variation in the Mc, decreasing from 7.0 since 1793 to 3.0 since 1995, and with the lowest estimate (2.5) in Central Costa Rica. The b-values of 0.85 for the entire catalog and ~0.83 for the interplate zones, are similar to other regions worldwide with young subducting slabs. There is a general trend of higher and more variable b-values among the upper-plate (average 0.90) and intraslab (1.14) zones as compared to the interplate regions (0.85). The upper-plate variability is explained in terms of the diversity in geological units and faulting style, whereas in the interplate and the subducting slab is connected to the stress level imposed by different seafloor morphologies and hydration states along the margin. Our data suggest a seismic potential of moment magnitude (Mw) 7.9–8.0 for the Nicoya and Southern Nicaragua interplate zones and for the Limon region. The Gutenberg-Richter distribution shows that a Mw 7.0 has a longer MRI for the intraslab zones (~72 years) than for the subduction interplate region (~15 years) and plate and microplate boundaries (~40–45 years). Interplate earthquakes have occurred recently (1991 Mw 7.7 and 2012 Mw 7.6) but no major intraslab since 1948 (Mw 7.0).Universidad de Costa Rica/[731-B9-780]/UCR/Costa RicaUniversidad de Costa Rica/[113-B5-704]/UCR/Costa RicaUniversidad de Costa Rica/[113-B9-911]/UCR/Costa RicaUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela Centroamericana de Geologíaengacceso embargadohttp://purl.org/coar/access_right/c_f1cfinfo:eu-repo/semantics/embargoedAccessTectonophysics, vol.814, pp.1-18reponame:Kérwáinstname:Universidad de Costa Ricainstacron:UCRb-valueGutenberg-Richter relationshipEarthquake catalogMagnitude of completenessEarthquake declusteringSeismic sourcesSpatial variability of the b-value and seismic potential in Costa Ricaartículo originalhttp://purl.org/coar/resource_type/c_2df8fbb1info:eu-repo/semantics/articleORIGINAL2021_Arroyo_Linkimer_2021_ValorB.pdf2021_Arroyo_Linkimer_2021_ValorB.pdfArtículo principalapplication/pdf5354613https://www.kerwa.ucr.ac.cr/bitstreams/a8262c30-39f1-440a-a96b-015d5b791b57/download54d4046ce937c9d6cc1aac1e7de97340MD51LICENSElicense.txtlicense.txttext/plain; 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