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

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    Name:
    Meltzer-SRL-DataMine-Pedernale ...
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    Description:
    Final Accepted Manuscript
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    Author
    Meltzer, Anne
    Beck, Susan cc
    Ruiz, Mario
    Hoskins, Mariah
    Soto‐Cordero, Lillian
    Stachnik, Joshua C.
    Lynner, Colton cc
    Porritt, Rob
    Portner, Daniel
    Alvarado, Alexandra
    Hernandez, Stephen
    Yepes, Hugo
    Charvis, Philippe
    Font, Yvonne
    Regnier, Marc
    Agurto‐Detzel, Hans
    Rietbrock, Andreas
    Leon‐Rios, Sergio
    Diego Mercerat, E.
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    Affiliation
    Univ Arizona, Dept Geosci
    Issue Date
    2019-05
    
    Metadata
    Show full item record
    Publisher
    SEISMOLOGICAL SOC AMER
    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 ; 90 (3): 1346–1354. doi: https://doi.org/10.1785/0220180364
    Journal
    SEISMOLOGICAL RESEARCH LETTERS
    Rights
    © Seismological Society of America.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    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 M-w 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 Geofisico at the Escuela Politecnica 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 cata-log 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 similar to 100 km to the northeast of the mainshock in the epicentral region of an M-w 7.8 earthquake in 1958. In December, an increase in seismicity occurred similar to 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.
    Note
    12 month embargo; published online: 6 March 2019
    ISSN
    0895-0695
    1938-2057
    DOI
    10.1785/0220180364
    Version
    Final accepted manuscript
    Sponsors
    National Science Foundation (NSF) Rapid Response Research (RAPID) Program [EAR-1642498]; Portable Array Seismic Studies of the Continental Lithosphere (PASSCAL) facility of the Incorporated Research Institutions for Seismology (IRIS) through the PASSCAL Instrument Center at New Mexico Tech; NSF [EAR-1261681]; Department of Energy National Nuclear Security Administration; Instituto Geofisico at the Escuela Politecnica Nacional (IG-EPN) in Quito Ecuador; L'Institut de Recherche pour le Developpement (IRD) Geoazur at Universite de la Cote d'Azur France; Centre d'etudes et d'expertise sur les risques, l'environnement, la mobilite et l'amenagement (CEREMA) France; Natural Environment Research Council (NERC) in the United Kingdom
    Additional Links
    https://pubs.geoscienceworld.org/ssa/srl/article/90/3/1346/569205/The-2016-Mw78-Pedernales-Ecuador-Earthquake-Rapid
    ae974a485f413a2113503eed53cd6c53
    10.1785/0220180364
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