Seismic cycle controlled by subduction geometry: novel 3-D quasi-dynamic model of Central Chile megathrust

Simple item page
dc.contributor.authorHerrera, Marco T.
dc.contributor.authorCrempien, Jorge G. F.
dc.contributor.authorCembrano, Jose
dc.contributor.authorMoreno, Marcos
dc.date.accessioned2025-01-20T17:06:45Z
dc.date.available2025-01-20T17:06:45Z
dc.date.issued2024
dc.description.abstractSubduction earthquakes show complex spatial and temporal rupture patterns, exhibiting events of varied sizes, which rupture distinct or overlapping fault segments. Elucidating first-order controlling conditions of rupture segmentation and return periods of large earthquakes is therefore critical for seismic and tsunami hazard estimations. The Chilean subduction zone frequently hosts several M-w > 8 earthquakes, with heterogeneous recurrence rates and locations. Here, we implement 3-D quasi-dynamic rate and state frictional models to investigate the role of plate interface geometry on the distribution of interseismic coupling and coseismic ruptures in Central Chile. First, we develop synthetic-parametric models that show how dip and strike variations may increase the probabilities to produce partial seismic barriers, which tend to avoid the production of large earthquake ruptures and modulate rupture lengths. Then, we simulate the subduction seismic cycle processes on Central Chile (25(degrees)S-38(degrees)S), imposing depth-dependent frictional properties on a realistic non-planar 3-D subduction interface geometry. Similar to results obtained for synthetic-parametric models, after 5000 yr of simulation, regions with abrupt dip or strike changes increase the probabilities of stopping coseismic propagation of simulated M-w 8.0-9.0 earthquakes. Our simulated earthquake sequences on the Central Chile subduction zone delimit rupture areas that match geometrical interface features and historical earthquakes, results that point to the crucial role of fault interface geometry on seismic cycle segmentation along strike.
dc.fuente.origenWOS
dc.identifier.doi10.1093/gji/ggae069
dc.identifier.eissn1365-246X
dc.identifier.issn0956-540X
dc.identifier.urihttps://doi.org/10.1093/gji/ggae069
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90819
dc.identifier.wosidWOS:001183133300002
dc.issue.numero2
dc.language.isoen
dc.pagina.final787
dc.pagina.inicio772
dc.revistaGeophysical journal international
dc.rightsacceso restringido
dc.subjectFriction
dc.subjectSeismic cycle
dc.subjectSouth America
dc.subjectNumerical modelling
dc.subjectSubduction zone processes
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleSeismic cycle controlled by subduction geometry: novel 3-D quasi-dynamic model of Central Chile megathrust
dc.typeartículo
dc.volumen237
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
ggae069.pdf
Size:
2.85 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas