Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico

The parameters allowing for near-trench megathrust ruptures are debated and commonly involve the presence of site-dependent tectonic factors (e.g. rough subducting topography, amount of sediments), implying the need for direct geophysical observations. Here we use seismic imaging techniques to explo...

Full description

Bibliographic Details
Authors: Prada Dacasa, Manuel, Bartolomé de la Peña, Rafael, Gras Andreu, Clàudia, Bandy, William L., Dañobeitia, Juan José
Format: article
Status:Published version
Publication Date:2023
Country:España
Institution:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repository:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/215076
Online Access:https://hdl.handle.net/2445/215076
Access Level:Open access
Keyword:Geodinàmica
Tectònica de plaques
Geofísica
Sismologia
Mèxic
Geodynamics
Plate tectonics
Geophysics
Seismology
Mexico
id ES_babae840a6d211b6f2b1e641bac3da97
oai_identifier_str oai:recercat.cat:2445/215076
network_acronym_str ES
network_name_str España
repository_id_str
spelling Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, MexicoPrada Dacasa, ManuelBartolomé de la Peña, RafaelGras Andreu, ClàudiaBandy, William L.Dañobeitia, Juan JoséGeodinàmicaTectònica de plaquesGeofísicaSismologiaMèxicGeodynamicsPlate tectonicsGeophysicsSeismologyMexicoThe parameters allowing for near-trench megathrust ruptures are debated and commonly involve the presence of site-dependent tectonic factors (e.g. rough subducting topography, amount of sediments), implying the need for direct geophysical observations. Here we use seismic imaging techniques to explore the mechanisms triggering shallow ruptures in the Rivera subduction zone, along the non-accretionary Jalisco-Colima continental margin, W Mexico, where three large (Mw~8) tsunamigenic megathrust earthquakes occurred in the last century. The seismic image reveals large interplate topographic variations morphologically alike to incoming trench-parallel ridges seaward of the study area. Ridge subduction only occurs along the southern non-accretionary margin of the Rivera system, where past earthquakes released large near-trench coseismic energy, indicating that subducting ridges enhance interplate coupling. Subducting ridges uplift the margin, causing upper-plate fracturing and low rigidity areas. Such elastic structure quantitatively explains the dynamics of slow and tsunamigenic ruptures in the past. We conclude that ridge subduction beneath the Jalisco-Colima continental margin promotes shallow seismogenesis and explains the large tsunamigenic potential of the area.Nature Research2024202420232024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion8 p.application/pdfhttps://hdl.handle.net/2445/215076Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1038/s43247-023-00705-9Communications Earth & Environment, 2023, vol. 4, p. 1-8https://doi.org/10.1038/s43247-023-00705-9cc-by (c) Prada Dacasa, Manuel et al., 2023http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2150762026-05-29T05:05:01Z
dc.title.none.fl_str_mv Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
title Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
spellingShingle Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
Prada Dacasa, Manuel
Geodinàmica
Tectònica de plaques
Geofísica
Sismologia
Mèxic
Geodynamics
Plate tectonics
Geophysics
Seismology
Mexico
title_short Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
title_full Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
title_fullStr Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
title_full_unstemmed Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
title_sort Trench-parallel ridge subduction controls upper-plate structure and shallow megathrust seismogenesis along the Jalisco-Colima margin, Mexico
dc.creator.none.fl_str_mv Prada Dacasa, Manuel
Bartolomé de la Peña, Rafael
Gras Andreu, Clàudia
Bandy, William L.
Dañobeitia, Juan José
author Prada Dacasa, Manuel
author_facet Prada Dacasa, Manuel
Bartolomé de la Peña, Rafael
Gras Andreu, Clàudia
Bandy, William L.
Dañobeitia, Juan José
author_role author
author2 Bartolomé de la Peña, Rafael
Gras Andreu, Clàudia
Bandy, William L.
Dañobeitia, Juan José
author2_role author
author
author
author
dc.subject.none.fl_str_mv Geodinàmica
Tectònica de plaques
Geofísica
Sismologia
Mèxic
Geodynamics
Plate tectonics
Geophysics
Seismology
Mexico
topic Geodinàmica
Tectònica de plaques
Geofísica
Sismologia
Mèxic
Geodynamics
Plate tectonics
Geophysics
Seismology
Mexico
description The parameters allowing for near-trench megathrust ruptures are debated and commonly involve the presence of site-dependent tectonic factors (e.g. rough subducting topography, amount of sediments), implying the need for direct geophysical observations. Here we use seismic imaging techniques to explore the mechanisms triggering shallow ruptures in the Rivera subduction zone, along the non-accretionary Jalisco-Colima continental margin, W Mexico, where three large (Mw~8) tsunamigenic megathrust earthquakes occurred in the last century. The seismic image reveals large interplate topographic variations morphologically alike to incoming trench-parallel ridges seaward of the study area. Ridge subduction only occurs along the southern non-accretionary margin of the Rivera system, where past earthquakes released large near-trench coseismic energy, indicating that subducting ridges enhance interplate coupling. Subducting ridges uplift the margin, causing upper-plate fracturing and low rigidity areas. Such elastic structure quantitatively explains the dynamics of slow and tsunamigenic ruptures in the past. We conclude that ridge subduction beneath the Jalisco-Colima continental margin promotes shallow seismogenesis and explains the large tsunamigenic potential of the area.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
2024
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://hdl.handle.net/2445/215076
url https://hdl.handle.net/2445/215076
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1038/s43247-023-00705-9
Communications Earth & Environment, 2023, vol. 4, p. 1-8
https://doi.org/10.1038/s43247-023-00705-9
dc.rights.none.fl_str_mv cc-by (c) Prada Dacasa, Manuel et al., 2023
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Prada Dacasa, Manuel et al., 2023
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8 p.
application/pdf
dc.publisher.none.fl_str_mv Nature Research
publisher.none.fl_str_mv Nature Research
dc.source.none.fl_str_mv Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869417942983114752
score 15.812429

Similar Items