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The 2016 Mw 7.8 Pedernales, Ecuador, Earthquake: Rapid Response Deployment

2019; Seismological Society of America; Volume: 90; Issue: 3 Linguagem: Inglês

10.1785/0220180364

1938-2057

A. Meltzer, S. L. Beck, Mario Ruiz, Mariah Hoskins, Lillian Soto-Cordero, Joshua C. Stachnik, Colton Lynner, Rob Porritt, D. E. Portner, Alexandra Alvarado, Stephen Hernández, Hugo Yépes, Philippe Charvis, Yvonne Font, Marc Régnier, Hans Agurto‐Detzel, Andreas Rietbrock, Sergio León‐Ríos, Diego Mercerat,

Seismology and Earthquake Studies

Research Article| March 06, 2019 The 2016 Mw 7.8 Pedernales, Ecuador, Earthquake: Rapid Response Deployment Anne Meltzer; Anne Meltzer aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Search for other works by this author on: GSW Google Scholar Susan Beck; Susan Beck bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edu Search for other works by this author on: GSW Google Scholar Mario Ruiz; Mario Ruiz cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Search for other works by this author on: GSW Google Scholar Mariah Hoskins; Mariah Hoskins aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Search for other works by this author on: GSW Google Scholar Lillian Soto‐Cordero; Lillian Soto‐Cordero aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Search for other works by this author on: GSW Google Scholar Joshua C. Stachnik; Joshua C. Stachnik aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Search for other works by this author on: GSW Google Scholar Colton Lynner; Colton Lynner bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edu Search for other works by this author on: GSW Google Scholar Rob Porritt; Rob Porritt bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edugNow at the Institute for Geophysics, University of Texas, 10100 Burnet Road, Austin, Texas 78758 U.S.A. Search for other works by this author on: GSW Google Scholar Daniel Portner; Daniel Portner bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edu Search for other works by this author on: GSW Google Scholar Alexandra Alvarado; Alexandra Alvarado cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Search for other works by this author on: GSW Google Scholar Stephen Hernandez; Stephen Hernandez cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Search for other works by this author on: GSW Google Scholar Hugo Yepes; Hugo Yepes cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Search for other works by this author on: GSW Google Scholar Philippe Charvis; Philippe Charvis dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Search for other works by this author on: GSW Google Scholar Yvonne Font; Yvonne Font dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Search for other works by this author on: GSW Google Scholar Marc Regnier; Marc Regnier dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Search for other works by this author on: GSW Google Scholar Hans Agurto‐Detzel; Hans Agurto‐Detzel dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Search for other works by this author on: GSW Google Scholar Andreas Rietbrock; Andreas Rietbrock eDepartment of Earth, Ocean and Ecological Sciences, University of Liverpool, Jane Herdman Building, 4 Brownlow Street, Liverpool L69 3GP, United Kingdom, andreas.rietbrock@kit.edu, sergio.leon-rios@kit.eduhNow at Geophysical Institute (GPI), Karlsruhe Institute of Technology, Hertzstrase 16, 76187 Karlsruhe, Germany. Search for other works by this author on: GSW Google Scholar Sergio Leon‐Rios; Sergio Leon‐Rios eDepartment of Earth, Ocean and Ecological Sciences, University of Liverpool, Jane Herdman Building, 4 Brownlow Street, Liverpool L69 3GP, United Kingdom, andreas.rietbrock@kit.edu, sergio.leon-rios@kit.eduhNow at Geophysical Institute (GPI), Karlsruhe Institute of Technology, Hertzstrase 16, 76187 Karlsruhe, Germany. Search for other works by this author on: GSW Google Scholar E. Diego Mercerat E. Diego Mercerat fCEREMA Méditerranée, Project Team MOUVGS, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, diego.mercerat@cerema.fr Search for other works by this author on: GSW Google Scholar Author and Article Information Anne Meltzer aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Susan Beck bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edu Mario Ruiz cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Mariah Hoskins aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Lillian Soto‐Cordero aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Joshua C. Stachnik aDepartment of Earth and Environmental Sciences, Lehigh University, 1 West Packer Avenue, Bethlehem, Pennsylvania 18015 U.S.A., ameltzer@lehigh.edu, mac716@lehigh.edu, lis213@lehigh.edu, jcstachnik@gmail.com Colton Lynner bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edu Rob Porritt bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edugNow at the Institute for Geophysics, University of Texas, 10100 Burnet Road, Austin, Texas 78758 U.S.A. Daniel Portner bDepartment of Geosciences, University of Arizona, 1040 East 4th Street, Tucson, Arizona 85721 U.S.A., slbeck@email.arizona.edu, colton.lynner@gmail.com, rporritt@ig.utexas.edu, portner@email.arizona.edu Alexandra Alvarado cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Stephen Hernandez cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Hugo Yepes cInstituto Geofísico at the Escuela Politécnica Nacional, Ladrón de Guevara E11‐253, Apartado 2759, Quito, Ecuador, mruiz@igepn.edu.ec, aalvarado@igepn.edu.ec, hernandez.stephen@gmail.com, hyepes@igepn.edu.ec Philippe Charvis dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Yvonne Font dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Marc Regnier dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Hans Agurto‐Detzel dUniversité Côte d'Azur IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, philippe.charvis@geoazur.unice.fr, font@geoazur.unice.fr, regnier@geoazur.unice.fr, agurto@geoazur.unice.fr Andreas Rietbrock eDepartment of Earth, Ocean and Ecological Sciences, University of Liverpool, Jane Herdman Building, 4 Brownlow Street, Liverpool L69 3GP, United Kingdom, andreas.rietbrock@kit.edu, sergio.leon-rios@kit.eduhNow at Geophysical Institute (GPI), Karlsruhe Institute of Technology, Hertzstrase 16, 76187 Karlsruhe, Germany. Sergio Leon‐Rios eDepartment of Earth, Ocean and Ecological Sciences, University of Liverpool, Jane Herdman Building, 4 Brownlow Street, Liverpool L69 3GP, United Kingdom, andreas.rietbrock@kit.edu, sergio.leon-rios@kit.eduhNow at Geophysical Institute (GPI), Karlsruhe Institute of Technology, Hertzstrase 16, 76187 Karlsruhe, Germany. E. Diego Mercerat fCEREMA Méditerranée, Project Team MOUVGS, Géoazur, 250 rue Albert Einstein, Sophia Antipolis, 06560 Valbonne, France, diego.mercerat@cerema.fr Publisher: Seismological Society of America First Online: 06 Mar 2019 Online Issn: 1938-2057 Print Issn: 0895-0695 © Seismological Society of America Seismological Research Letters (2019) 90 (3): 1346–1354. https://doi.org/10.1785/0220180364 Article history First Online: 06 Mar 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Anne Meltzer, Susan Beck, Mario Ruiz, Mariah Hoskins, Lillian Soto‐Cordero, Joshua C. Stachnik, Colton Lynner, Rob Porritt, Daniel Portner, Alexandra Alvarado, Stephen Hernandez, Hugo Yepes, Philippe Charvis, Yvonne Font, Marc Regnier, Hans Agurto‐Detzel, Andreas Rietbrock, Sergio Leon‐Rios, E. Diego Mercerat; The 2016 Mw 7.8 Pedernales, Ecuador, Earthquake: Rapid Response Deployment. Seismological Research Letters 2019;; 90 (3): 1346–1354. doi: https://doi.org/10.1785/0220180364 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search ABSTRACT The April 2016 Pedernales earthquake ruptured a 100 km by 40 km segment of the subduction zone along the coast of Ecuador in an Mw 7.8 megathrust event east of the intersection of the Carnegie ridge with the trench. This portion of the subduction zone has ruptured on decadal time scales in similar size and larger earthquakes, and exhibits a range of slip behaviors, variations in segmentation, and degree of plate coupling along strike. Immediately after the earthquake, an international rapid response effort coordinated by the Instituto Geofísico at the Escuela Politécnica Nacional in Quito deployed 55 seismometers and 10 ocean‐bottom seismometers above the rupture zone and adjacent areas to record aftershocks. In this article, we describe the details of the U.S. portion of the rapid response and present an earthquake catalog from May 2016 to May 2017 produced using data recorded by these stations. Aftershocks focus in distinct clusters within and around the rupture area and match spatial patterns observed in long‐term seismicity. For the first two and a half months, aftershocks exhibit a relatively sharp cutoff to the north of the mainshock rupture. In early July, an earthquake swarm occurred ∼100 km to the northeast of the mainshock in the epicentral region of an Mw 7.8 earthquake in 1958. In December, an increase in seismicity occurred ∼70 km to the northeast of the mainshock in the epicentral region of the 1906 earthquake. Data from the Pedernales earthquake and aftershock sequence recorded by permanent seismic and geodetic networks in Ecuador and the dense aftershock deployment provide an opportunity to examine the persistence of asperities for large to great earthquakes over multiple seismic cycles, the role of asperities and slow slip in subduction‐zone megathrust rupture, and the relationship between locked and creeping parts of the subduction interface. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.