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Ridge Subduction and Afterslip Control Aftershock Distribution of the 2016 Mw 7.8 Ecuador Earthquake

Ridge Subduction and Afterslip Control Aftershock Distribution of the 2016 Mw 7.8 Ecuador Earthquake

This is a Preprint and has not been peer reviewed. The published version of this Preprint is available: https://doi.org/10.1016/j.epsl.2019.05.029. This is version 1 of this Preprint.

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Authors

Hans Agurto-Detzel, Yvonne Font, Philippe Charvis, Marc Régnier, Andreas Rietbrock, David Ambrois, Michele Paulatto, Alexandra Alvarado, Susan Beck, ...  more

Abstract

We characterise the aftershock sequence following the 2016 Mw=7.8 Pedernales earthquake. More than 10,000 events were detected and located, with magnitudes up to 6.9. Most of the aftershock seismicity results from interplate thrust faulting, but we also observe a few normal and strike-slip mechanisms. Seismicity extends for more than 300 km along strike, and is constrained between the trench and the maximum depth of the coseismic rupture. The most striking feature is the presence of three seismicity bands, perpendicular to the trench, which are also observed during the interseismic period. Additionally, we observe a linear dependency between ...  more

DOI

https://doi.org/10.31223/osf.io/39jvx

Subjects

Earth Sciences, Geophysics and Seismology, Physical Sciences and Mathematics

Keywords

aftershocks, afterslip, subduction, Ecuador, Carnegie Ridge, Seafloor Relief

Dates

Published: 2019-04-02 13:11

License

Academic Free License (AFL) 3.0