Coseismic seafloor deformation in the trench region during the Mw8.8 Maule megathrust earthquake.

ABSTRACT: The M_w 8.8 megathrust earthquake that occurred on 27 February 2010 offshore the Maule region of central Chile triggered a destructive tsunami. Whether the earthquake rupture extended to the shallow part of the plate boundary near the trench remains controversial. The up-dip limit of rupture during large subduction zone earthquakes has important implications for tsunami generation and for the rheological behavior of the sedimentary prism in accretionary margins. However, in general, the slip models derived from tsunami wave modeling and seismological data are poorly constrained by direct seafloor geodetic observations. We difference swath bathymetric data acquired across the trench in 2008, 2011 and 2012 and find ~3-5 m of uplift of the seafloor landward of the deformation front,

SUBMITTER: Maksymowicz A 

PROVIDER: S-EPMC5381107 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature