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000006347 005__ 20230203102416.0
000006347 0247_ $$2DOI$$a10.1038/s41598-022-22752-6
000006347 037__ $$aSCART-2023-0112
000006347 100__ $$aAmmirati, Jean Baptiste
000006347 245__ $$aStress transmission along mid-crustal faults highlighted by the 2021 Mw 6.5 San Juan (Argentina) earthquake
000006347 260__ $$c2022
000006347 520__ $$aUnderstanding the mechanisms of crustal deformation along convergent margins is critical to identifying seismogenic structures and assessing earthquake hazards for nearby urban centers. In the southern central Andes (28–33°S), differences in the style of middle to upper-crustal deformation and associated seismicity are highlighted by the January 19th, 2021 (Mw 6.5) San Juan earthquake. We integrate waveforms recorded at regional and teleseismic distances with co-seismic displacements calculated from local Global Navigation Satellite System time series, to re-estimate the source parameters of the 2021 San Juan earthquake, confirming a mid-crustal nucleation depth (21 ± 2 km) and right-lateral transpressional mechanism. Considered alongside decades of seismic observations and geological data, this event provides evidence for retroarc deformation partitioning among inherited basement faults and upper-crustal structures in response to oblique convergence of the Nazca and South American plates. As they may transfer shortening to active upper-crustal faults associated with historically devastating shallower earthquakes, a better understanding of seismogenic basement faults such as the mid-crustal structure activated during the 2021 San Juan earthquake earthquake could help future re-assessment of the seismic risk in western Argentina.
000006347 594__ $$aNO
000006347 700__ $$aMackaman-Lofland, Chelsea
000006347 700__ $$aZeckra, Martin
000006347 700__ $$aGobron, Kevin
000006347 773__ $$cArticle number: 17939$$n1$$pScientific Reports$$v 12$$y2022
000006347 8560_ $$fmartin.zeckra@observatory.be
000006347 85642 $$ahttps://www.nature.com/articles/s41598-022-22752-6
000006347 8564_ $$s7333749$$uhttp://publi2-as.oma.be/record/6347/files/s41598-022-22752-6.pdf
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000006347 905__ $$apublished in
000006347 980__ $$aREFERD