The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications

We invert GPS position data to map fhe slip on the plate interface during an aseismic, slow~slip event, which occurred in 2002 in the Guerrero seismic gap of the M~xican subduction zone, lasted for -4 months, and was detected by 7 continuous GPS receivers located over an area of -550x250 km2. Our be...

Descripción completa

Detalles Bibliográficos
Autores: Iglesias, A., Singh, S. K., Lowry, A. R., Kostoglodov, V., Larson, K. M., Franco-Sanchez, S. I.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2004
País:México
Institución:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
Repositorio:Geofísica Internacional
Idioma:español
inglés
OAI Identifier:oai:revistagi.geofisica.unam.mx:article/953
Acceso en línea:http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/953
Access Level:acceso abierto
Palabra clave:Sismo lento
Brecha sisimica de Guerrero
GPS
Slow earthquake
Guerrero seismic gap
id MX_28fdd3e5e8df5ec0fd8c0de6a3400a0e
oai_identifier_str oai:revistagi.geofisica.unam.mx:article/953
network_acronym_str MX
network_name_str México
repository_id_str
spelling The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implicationsThe silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implicationsIglesias, A.Singh, S. K.Lowry, A. R.Kostoglodov, V.Larson, K. M.Franco-Sanchez, S. I.Sismo lentoBrecha sisimica de GuerreroGPSSlow earthquakeGuerrero seismic gapGPSWe invert GPS position data to map fhe slip on the plate interface during an aseismic, slow~slip event, which occurred in 2002 in the Guerrero seismic gap of the M~xican subduction zone, lasted for -4 months, and was detected by 7 continuous GPS receivers located over an area of -550x250 km2. Our best model, under physically reasonable constraints, shows that the slow slip occurred on the transition zone at a distancejrange oflOO to 170 km from the trench. The average slip was about 22.5 em (Mo-2.97 xlOZ7 dyne-em, Mw=7.6). This model implies an increased shear stress at the bottom of the locked, seismogenic part of the interface which lies updip from the transition zone, and, hence, an enhanced seismic hazard. The results from other similar subduction zones also favor this model. However, we cannot rule out an alternative model that requires slow slip to invade the seismogenic zone as well. A definitive answer to this critical issue would require more GPS stations and long-term monitoring.Con el firi de determinar Ia distribucion de deslizarnientos debida a un sismo Iento que ocurrio en Ia interfase de las placas en la zona de la brecha sismica de Guerrero, llevarnos a cabo una inversion de los datos de posicion obtenidos a traves de estaciones GPS. Este sismo Iento, con duracion aproximada de 4 meses, fue registrado por 7 estaciones permanentes de GPS localizadas en un area de -550x250 km2• El mejor modelo obtenido, considerando algunas restricciones fisicarnente razonables, muestra que el deslizarniento ocurrio en la zona de transicion a una distancia de entre 100 y 170 km de la trinchera. El deslizarniento promedio obtenido fue de alrededor de 22.5 em (Mo-2.97 xl027 dyna-cm, Mw=7.6). Nuestro modelo implica un aumento en los esfuerzos de corte en la zona acoplada que se encuentra adyacente ala de transicion. Esta zona acoplada es Ia parte sismogenica de Ia interfase, por lo que este modelo implica un incremento en el peligro sismico en Ia region. Los resultados obtenidos para escenarios similares en otras zonas de subduccion favorecen tarnbien la eleccion de este modelo. Sin embargo, con los datos disponibles, no es posible descartar un modelo que requiere que el deslizarniento Iento invada tarnbien Ia zona sismogenica. Un mayor numero de estaciones de GPS, asi como un monitoreo mas prolongado de la deforrnacion, proporcionaria Ia informacion necesaria para discriminar entre ambos modelos.Universidad Nacional Autónoma de México. Instituto de Geofísica2004-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/95310.22201/igeof.00167169p.2004.43.3.953Geofisica Internacional; Vol. 43 No. 3 (2004): July 1, 2004; 309-317Geofísica Internacional; Vol. 43 Núm. 3 (2004): Julio 1, 2004; 309-3172954-436X0016-716910.22201/igeof.00167169p.2004.43.3reponame:Geofísica Internacionalinstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMspaenghttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/953/1105http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/953/2562https://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessoai:revistagi.geofisica.unam.mx:article/9532024-08-16T17:32:02Z
dc.title.none.fl_str_mv The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
title The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
spellingShingle The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
Iglesias, A.
Sismo lento
Brecha sisimica de Guerrero
GPS
Slow earthquake
Guerrero seismic gap
GPS
title_short The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
title_full The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
title_fullStr The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
title_full_unstemmed The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
title_sort The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): Inversion of slip on the plate interface and some implications
dc.creator.none.fl_str_mv Iglesias, A.
Singh, S. K.
Lowry, A. R.
Kostoglodov, V.
Larson, K. M.
Franco-Sanchez, S. I.
author Iglesias, A.
author_facet Iglesias, A.
Singh, S. K.
Lowry, A. R.
Kostoglodov, V.
Larson, K. M.
Franco-Sanchez, S. I.
author_role author
author2 Singh, S. K.
Lowry, A. R.
Kostoglodov, V.
Larson, K. M.
Franco-Sanchez, S. I.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Sismo lento
Brecha sisimica de Guerrero
GPS
Slow earthquake
Guerrero seismic gap
GPS
topic Sismo lento
Brecha sisimica de Guerrero
GPS
Slow earthquake
Guerrero seismic gap
GPS
description We invert GPS position data to map fhe slip on the plate interface during an aseismic, slow~slip event, which occurred in 2002 in the Guerrero seismic gap of the M~xican subduction zone, lasted for -4 months, and was detected by 7 continuous GPS receivers located over an area of -550x250 km2. Our best model, under physically reasonable constraints, shows that the slow slip occurred on the transition zone at a distancejrange oflOO to 170 km from the trench. The average slip was about 22.5 em (Mo-2.97 xlOZ7 dyne-em, Mw=7.6). This model implies an increased shear stress at the bottom of the locked, seismogenic part of the interface which lies updip from the transition zone, and, hence, an enhanced seismic hazard. The results from other similar subduction zones also favor this model. However, we cannot rule out an alternative model that requires slow slip to invade the seismogenic zone as well. A definitive answer to this critical issue would require more GPS stations and long-term monitoring.
publishDate 2004
dc.date.none.fl_str_mv 2004-07-01
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 http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/953
10.22201/igeof.00167169p.2004.43.3.953
url http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/953
identifier_str_mv 10.22201/igeof.00167169p.2004.43.3.953
dc.language.none.fl_str_mv spa
eng
language spa
eng
dc.relation.none.fl_str_mv http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/953/1105
http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/953/2562
dc.rights.none.fl_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv 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 Autónoma de México. Instituto de Geofísica
publisher.none.fl_str_mv Universidad Nacional Autónoma de México. Instituto de Geofísica
dc.source.none.fl_str_mv Geofisica Internacional; Vol. 43 No. 3 (2004): July 1, 2004; 309-317
Geofísica Internacional; Vol. 43 Núm. 3 (2004): Julio 1, 2004; 309-317
2954-436X
0016-7169
10.22201/igeof.00167169p.2004.43.3
reponame:Geofísica Internacional
instname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron:UNAM
instname_str UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
instacron_str UNAM
institution UNAM
reponame_str Geofísica Internacional
collection Geofísica Internacional
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1858174733358465024
score 15,811543

Similares en LA Referencia