Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)

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On February 21, 1996, an earthquake shook the northern region of Peru. This event generated a tsunami with 2-3 m height waves. From the analysis and the signal processing of 15 broadband teleseismic stations, a waveform inversion was performed to obtain the focal mechanism and source time function i...

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Detalles Bibliográficos
Autores: Jiménez, C., Calvo, M., Tavera, H.
Formato: artículo
Fecha de Publicación:2015
Institución:Universidad Nacional Mayor de San Marcos
Repositorio:Revistas - Universidad Nacional Mayor de San Marcos
Lenguaje:español
OAI Identifier:oai:ojs.csi.unmsm:article/11578
Enlace del recurso:https://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/11578
Nivel de acceso:acceso abierto
Materia:Slow earthquake
numerical modeling
tsunami
Sismo lento
modelo numérico
maremoto
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spelling Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)Estudio numérico del sismo lento y maremoto de Chimbote 1996 (7.6 Mw)Jiménez, C.Calvo, M.Tavera, H.Slow earthquakenumerical modelingtsunamiSismo lentomodelo numéricomaremotoOn February 21, 1996, an earthquake shook the northern region of Peru. This event generated a tsunami with 2-3 m height waves. From the analysis and the signal processing of 15 broadband teleseismic stations, a waveform inversion was performed to obtain the focal mechanism and source time function indicating a complex rupture process. The total duration of the rupture was 75 s, a rather high value for a relatively small earthquake. The calculated scalar seismic moment was 3.8 × 1020 Nm, which corresponds to a moment magnitude of 7.6 Mw. The slip distribution is heterogeneous, consistent with the source time function, with a maximum slip of 6.6 m around the main asperity concentrated in an area of 30×30 km2. Coseismic deformation field was calculated for 28 sub-faults, which was used as the initial condition of the tsunami propagation. Synthetics mareograms were calculated for Chimbote and Salaverry with maximum heights of 1.8 m and 1.0 m, respectively.El 21 de febrero de 1996 un sismo sacudió la región norte del Perú. Este evento generó un maremoto con olas de 2 a 3 m de altura. Del análisis y el procesamiento de las señales de banda ancha de 15 estaciones telesísmicas, se realizó la inversión de las formas de onda para obtener el mecanismo focal y la función temporal de la fuente, que indica un proceso de ruptura complejo. La duración total del proceso de ruptura fue de 75 s, un valor bastante alto para un sismo relativamente pequeño. El momento sísmico escalar calculado fue de 3.8×1020 Nm, equivalente a una magnitud de momento de 7.6 Mw. La distribución de la dislocación es heterogénea y consistente con la función temporal de la fuente, con una dislocación máxima de 6.6 m en torno a la aspereza principal concentrada en un área de 30×30 km2. Se calculó el campo de deformación cosísmico a partir de 28 subfuentes, el cual se utilizó como condición inicial de la propagación del maremoto. Se calcularon los mareogramas sintéticos para Chimbote y Salaverry con alturas máximas de 1.8 m y 1.0 m, respectivamenteUniversidad Nacional Mayor de San Marcos2015-07-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/1157810.15381/rif.v18i1.11578Revista de Investigación de Física; Vol. 18 No. 1 (2015); 1-9Revista de Investigación de Física; Vol. 18 Núm. 1 (2015); 1-91728-29771605-7724reponame:Revistas - Universidad Nacional Mayor de San Marcosinstname:Universidad Nacional Mayor de San Marcosinstacron:UNMSMspahttps://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/11578/10384Derechos de autor 2015 C. Jiménez, M. Calvo, H. Taverahttps://creativecommons.org/licenses/by-nc-sa/4.0info:eu-repo/semantics/openAccessoai:ojs.csi.unmsm:article/115782020-09-03T21:09:07Z
dc.title.none.fl_str_mv Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
Estudio numérico del sismo lento y maremoto de Chimbote 1996 (7.6 Mw)
title Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
spellingShingle Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
Jiménez, C.
Slow earthquake
numerical modeling
tsunami
Sismo lento
modelo numérico
maremoto
title_short Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
title_full Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
title_fullStr Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
title_full_unstemmed Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
title_sort Numerical study of the 1996 Chimbote slow earthquake and tsunami (7.6 Mw)
dc.creator.none.fl_str_mv Jiménez, C.
Calvo, M.
Tavera, H.
author Jiménez, C.
author_facet Jiménez, C.
Calvo, M.
Tavera, H.
author_role author
author2 Calvo, M.
Tavera, H.
author2_role author
author
dc.subject.none.fl_str_mv Slow earthquake
numerical modeling
tsunami
Sismo lento
modelo numérico
maremoto
topic Slow earthquake
numerical modeling
tsunami
Sismo lento
modelo numérico
maremoto
description On February 21, 1996, an earthquake shook the northern region of Peru. This event generated a tsunami with 2-3 m height waves. From the analysis and the signal processing of 15 broadband teleseismic stations, a waveform inversion was performed to obtain the focal mechanism and source time function indicating a complex rupture process. The total duration of the rupture was 75 s, a rather high value for a relatively small earthquake. The calculated scalar seismic moment was 3.8 × 1020 Nm, which corresponds to a moment magnitude of 7.6 Mw. The slip distribution is heterogeneous, consistent with the source time function, with a maximum slip of 6.6 m around the main asperity concentrated in an area of 30×30 km2. Coseismic deformation field was calculated for 28 sub-faults, which was used as the initial condition of the tsunami propagation. Synthetics mareograms were calculated for Chimbote and Salaverry with maximum heights of 1.8 m and 1.0 m, respectively.
publishDate 2015
dc.date.none.fl_str_mv 2015-07-15
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://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/11578
10.15381/rif.v18i1.11578
url https://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/11578
identifier_str_mv 10.15381/rif.v18i1.11578
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv https://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/11578/10384
dc.rights.none.fl_str_mv Derechos de autor 2015 C. Jiménez, M. Calvo, H. Tavera
https://creativecommons.org/licenses/by-nc-sa/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Derechos de autor 2015 C. Jiménez, M. Calvo, H. Tavera
https://creativecommons.org/licenses/by-nc-sa/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Mayor de San Marcos
publisher.none.fl_str_mv Universidad Nacional Mayor de San Marcos
dc.source.none.fl_str_mv Revista de Investigación de Física; Vol. 18 No. 1 (2015); 1-9
Revista de Investigación de Física; Vol. 18 Núm. 1 (2015); 1-9
1728-2977
1605-7724
reponame:Revistas - Universidad Nacional Mayor de San Marcos
instname:Universidad Nacional Mayor de San Marcos
instacron:UNMSM
instname_str Universidad Nacional Mayor de San Marcos
instacron_str UNMSM
institution UNMSM
reponame_str Revistas - Universidad Nacional Mayor de San Marcos
collection Revistas - Universidad Nacional Mayor de San Marcos
repository.name.fl_str_mv
repository.mail.fl_str_mv
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