The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile
Abstract Quaternary deformation in the northern Chile forearc is controlled by trench parallel shortening along reactivated Mesozoic faults. Dextral strikes-slip is expressed in NW–SE striking faults of the Atacama Fault System, and reverse displacement dominates in E–W faults. This deformation resu...
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Nature Portfolio
2021
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oai:doaj.org-article:256ccdedba52466680d3dee187e1656c2021-11-08T10:46:32ZThe role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile10.1038/s41598-021-00875-62045-2322https://doaj.org/article/256ccdedba52466680d3dee187e1656c2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00875-6https://doaj.org/toc/2045-2322Abstract Quaternary deformation in the northern Chile forearc is controlled by trench parallel shortening along reactivated Mesozoic faults. Dextral strikes-slip is expressed in NW–SE striking faults of the Atacama Fault System, and reverse displacement dominates in E–W faults. This deformation results of the convergence in a concave-seaward continental margin. On September 11th, 2020, a Mw 6.3 earthquake and its subsequent aftershocks took place in the coastal region of northern Chile, revealing the reactivation of the deepest segment of a WNW–ESE striking upper plate fault. The reactivation of this fault occurred after the Mw 8.1 Iquique earthquake, and it seems to be connected to a N–S interplate locking segmentation of the plate margin, which is clearly shown by the locking pattern before the Iquique earthquake. This poses the question of how heterogeneous locking influences upper plate seismicity and how it relates to trench-parallel shortening.Gabriel GonzálezFrancisco Pasten-ArayaPia VictorYerko GonzálezJordán ValenzuelaMahesh ShrivastavaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021) |
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DOAJ |
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DOAJ |
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Medicine R Science Q |
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Medicine R Science Q Gabriel González Francisco Pasten-Araya Pia Victor Yerko González Jordán Valenzuela Mahesh Shrivastava The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile |
| description |
Abstract Quaternary deformation in the northern Chile forearc is controlled by trench parallel shortening along reactivated Mesozoic faults. Dextral strikes-slip is expressed in NW–SE striking faults of the Atacama Fault System, and reverse displacement dominates in E–W faults. This deformation results of the convergence in a concave-seaward continental margin. On September 11th, 2020, a Mw 6.3 earthquake and its subsequent aftershocks took place in the coastal region of northern Chile, revealing the reactivation of the deepest segment of a WNW–ESE striking upper plate fault. The reactivation of this fault occurred after the Mw 8.1 Iquique earthquake, and it seems to be connected to a N–S interplate locking segmentation of the plate margin, which is clearly shown by the locking pattern before the Iquique earthquake. This poses the question of how heterogeneous locking influences upper plate seismicity and how it relates to trench-parallel shortening. |
| format |
article |
| author |
Gabriel González Francisco Pasten-Araya Pia Victor Yerko González Jordán Valenzuela Mahesh Shrivastava |
| author_facet |
Gabriel González Francisco Pasten-Araya Pia Victor Yerko González Jordán Valenzuela Mahesh Shrivastava |
| author_sort |
Gabriel González |
| title |
The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile |
| title_short |
The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile |
| title_full |
The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile |
| title_fullStr |
The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile |
| title_full_unstemmed |
The role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern Chile |
| title_sort |
role of interplate locking on the seismic reactivation of upper plate faults on the subduction margin of northern chile |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/256ccdedba52466680d3dee187e1656c |
| work_keys_str_mv |
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