S53C:
Subduction Zone Structure and Interplate Slip Along the Pacific Margin of South America II Posters

Submit an Abstract to this Session



Session ID#: 23736

Session Description:
Many subduction-related parameters, such as incoming plate age, roughness, and sediment thickness, thought to control earthquake generation and slip behavior are found along the ~6500-km long Nazca/South America plate boundary, making this margin a natural laboratory for comparative studies. Furthermore, there is a rich historic record of earthquake activity extending back to ~1500 AD, with 9 earthquakes of Mw≥7.6 since 2000 that have been well recorded by modern seismological and geodetic instrumentation. This enables detailed studies of the relationship between Earth structure, seismic and aseismic slip, and earthquake nucleation, propagation and segmentation. We invite contributions from the broad range of disciplines that contribute to understanding earthquake processes along the Pacific margin of South America, including studies related to the Mw7.8 2016 Ecuador earthquake, recent controlled-source experiments along the Chilean margin, and advances in geodetic monitoring of the subduction zone.
Primary Convener:  Anne M Trehu, Oregon State University, CEOAS, Corvallis, United States; Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
Conveners:  Heidrun Kopp, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Diana Comte, Universidad de Chile, AMTC FCFM, Santiago, Chile and Hans Agurto-Detzel, Géoazur - Université Nice Sophia Antipolis, Valbonne, France
Chairs:  Audrey Galve, Université Côte d’Azur, CNRS, IRD, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France and Kathy K Davenport, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
OSPA Liaison:  Nathan L Bangs, Univ Texas, Institute for Geophysics, Austin, United States
Co-Organized with:
Seismology, Geodesy, Natural Hazards, and Tectonophysics

Cross-Listed:
  • G - Geodesy
  • NH - Natural Hazards
  • T - Tectonophysics
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
4302 Geological [NATURAL HAZARDS]
7215 Earthquake source observations [SEISMOLOGY]
8123 Dynamics: seismotectonics [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Seismicity near a Highly-Coupled Patch in the Central Ecuador Subduction Zone (233288)
Marc M Regnier1,2, Monica Segovia3, Yvonne Font2,4, Philippe Charvis5,6, Audrey Galve7, Paul Jarrin8, Yann Hello9,10, Mario Calixto Ruiz8 and Andres Pazmino11, (1)Géoazur - Université Côte d'Azur - IRD - CNRS - Observatoire de la côte d'Azur, Valbonne, France, (2)Université Côte d’Azur, IRD, Observatoire de la Côte d'Azur, CNRS, Géoazur, Valbonne, France, (3)GeoAzur, Valbonne, France, (4)IRD Institute for Research and Development, Marseille Cedex 02, France, (5)Institut de Recherche pour le Développement - IRD, Valbonne, France, (6)Université Côte d’Azur, IRD, Observatoire Côte d'Azur, CNRS, Géoazur, Valbonne, France, (7)Université Côte d’Azur, CNRS, IRD, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France, (8)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador, (9)Université Côte d'Azur, IRD, CNRS, OCA, GéoAzur, Valbonne, France, (10)Université Côte d'Azur -IRD, Géoazur, Nice, France, (11)INOCAR, GUAYAQUIL, Ecuador
Imaging the deep structures of the convergent plates along the Ecuadorian subduction zone through receiver function analysis (272161)
Audrey Galve1, Philippe Charvis2, Marc M Regnier3, Yvonne Font3, Jean Mathieu Nocquet4 and Monica Segovia5, (1)Université Côte d’Azur, CNRS, Observatoire Côte d'Azur, IRD, Géoazur, Sophia Antipolis, Valbonne, France, (2)Université Côte d’Azur, IRD, Observatoire Côte d'Azur, CNRS, Géoazur, Valbonne, France, (3)Université Côte d’Azur, IRD, Observatoire de la Côte d'Azur, CNRS, Géoazur, Valbonne, France, (4)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d'Azur, Géoazur, Valbonne, France, (5)GeoAzur, Valbonne, France
New view on the rupture mode along the Colombia-Ecuador subduction zone (273190)
Masahiro Yoshimoto, Nagoya University, Furo-Cho,Chikusa-Ku,, Japan, Hiroyuki Kumagai, Nagoya University, Nagoya, Japan, Takeshi Sagiya, Nagoya Univ, Nagoya, Japan, Hector Mora-Paez, Servicio Geologico Colombiano, Bogota, Colombia and Nelson E Pulido, NIED National Research Institute for Earth Science and Disaster Prevention, Tsukuba, Japan
Rapid and Large Afterslip Following the 2016 Mw 7.8 Pedernales Earthquake, Ecuador (250520)
Frederique Rolandone1, Jean Mathieu Nocquet2, Patricia A Mothes3, Paul Jarrin3, Martin Vallée4, Nadaya Cubas5, Stephen Hernandez6, Morgan Plain3, Sandro Vaca7 and Yvonne Font8, (1)Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre de Paris, Paris, France, (2)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d'Azur, Géoazur, Valbonne, France, (3)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador, (4)Université de Paris, Institut de physique du globe de Paris, Paris, France, (5)Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, Paris, France, (6)Escuela Politécnica Nacional, Instituto Geofísico, Quito, Ecuador, (7)Instiut de Physique du Globe de Paris, Instituto Geofísico Quito-Ecuador, Paris, France, (8)Université Côte d’Azur, IRD, Observatoire de la Côte d'Azur, CNRS, Géoazur, Valbonne, France
New insights on co- and post-seismic deformation and slip behavior associated with the Mw7.8 2016 Pedernales, Ecuador earthquake and its aftershock sequence (243221)
Lillian Soto-Cordero1, Jennifer Leigh Nealy2, Anne Meltzer1, Hans Agurto-Detzel3, Alexandra Alvarado4, Susan L Beck5, Harley Benz6, Eric A Bergman7, Philippe Charvis8, Yvonne Font9, Gavin P Hayes6, Stephen Hernandez4, Mariah Chambers Hoskins10, Sergio Leon Rios11, Lynner Colton12, Marc M Regnier13, Andreas Rietbrock14, Josh C Stachnik1 and William L Yeck15, (1)Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States, (2)USGS National Earthquake Information Center Golden, Golden, CO, United States, (3)Géoazur - Université Nice Sophia Antipolis, Université Côte d'Azur, IRD, CNRS, OCA, Valbonne, France, (4)Instituto Geofísico de la Escuela Politécnica Nacional, Quito, Ecuador, (5)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (6)USGS National Earthquake Information Center, Golden, CO, United States, (7)Global Seismological Services, Golden, United States, (8)Géoazur - Université Côte d'Azur, IRD, CNRS, OCA, Valbonne, France, (9)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France, (10)Lehigh University, Earth and Environmental Sciences, Bethlehem, United States, (11)University of Liverpool, Liverpool, United Kingdom, (12)University of Arizona, Tucson, AZ, United States, (13)Géoazur - Université Côte d'Azur - IRD - CNRS - Observatoire de la côte d'Azur, Valbonne, France, (14)Karlsruhe Institute of Technology, Geophysical Institute, Karlsruhe, Germany, (15)USGS National Earthquake Information Center, Golden, United States
Aftershock Analysis of the 2016 Mw7.8 Pedernales (Ecuador) Earthquake: Seismotectonics, Seismicity Distribution and Relationship with Coseismic Slip Distribution (251603)
Hans Agurto-Detzel1, Yvonne Font2, Philippe Charvis3, David Ambrois2, Jerome Cheze2, Francoise Courboulex1, Louis De Barros1, Anne Deschamps1, Audrey Galve4, Maxime Godano1, Mireille Laigle4, Christophe Maron1, Xavier Martin1, Tony Monfret2, Davide Oregioni4, Fabrice Peix Sr2, Marc M Regnier5, Ben Yates1, Diego Mercerat6, Sergio Leon Rios7, Andreas Rietbrock8, Wilson Acero9, Alexandra Alvarado9, Gabriela Ponce9, Cristina Ramos9, Mario Calixto Ruiz10, Juan Carlos Singaucho9, Freddy Vasconez9, Cristian Viracucha9, Susan L Beck11, Lynner Colton12, Mariah Chambers Hoskins13, Anne Meltzer14, Lillian Soto-Cordero14 and Josh Stachnik14, (1)Géoazur - Université Nice Sophia Antipolis, Université Côte d'Azur, IRD, CNRS, OCA, Valbonne, France, (2)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France, (3)Géoazur - Université Côte d'Azur, IRD, CNRS, OCA, Valbonne, France, (4)Université Côte d’Azur, CNRS, IRD, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France, (5)Géoazur - Université Côte d'Azur - IRD - CNRS - Observatoire de la côte d'Azur, Valbonne, France, (6)CEREMA, Laboratoire de Nice, Nice, France, (7)University of Liverpool, Liverpool, United Kingdom, (8)Karlsruhe Institute of Technology, Geophysical Institute, Karlsruhe, Germany, (9)Instituto Geofísico de la Escuela Politécnica Nacional, Quito, Ecuador, (10)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador, (11)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (12)University of Arizona, Tucson, AZ, United States, (13)Lehigh University, Earth and Environmental Sciences, Bethlehem, United States, (14)Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States
The 2016 Mw 7.8 Pedernales, Ecuador earthquake: Minimum 1D Velocity Model and Regional Moment Tensors Based on the Aftershock Sequence (270381)
Sergio Leon-Rios1, Ana luiza Aguiar2, Lidong Bie3, Benjamin Edwards4, Amaya Josefina Fuenzalida Velasco2, James Holt5, Thomas Garth2, Pablo J González6, Andreas Rietbrock7, Hans Agurto-Detzel8, Philippe Charvis9, Yvonne Font10, Jean Mathieu Nocquet11, Marc M Regnier12, Alexandra Renouard13, Diego Mercerat14, Michel Pernoud15, Susan L Beck16, Anne Meltzer17, Lillian Soto-Cordero17, Alexandra Alvarado18, Matthieu Perrault18, Mario Calixto Ruiz19 and Javier Santo18, (1)University of Liverpool, Liverpool, L69, United Kingdom, (2)University of Liverpool, Liverpool, United Kingdom, (3)Karlsruhe Institute of Technology, Geophysical Institute (GPI), Karlsruhe, Germany, (4)University of Liverpool, School of Environmental Sciences, Liverpool, NH, United States, (5)University of Liverpool, Institute for Risk and Uncertainty, Liverpool, United Kingdom, (6)University of Liverpool, Department of Earth, Ocean, and Ecological Sciences, Liverpool, United Kingdom, (7)Karlsruhe Institute of Technology, Geophysical Institute, Karlsruhe, Germany, (8)Géoazur - Université Nice Sophia Antipolis, Université Côte d'Azur, IRD, CNRS, OCA, Valbonne, France, (9)Université Côte d’Azur, CNRS, IRD, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France, (10)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France, (11)Institut de Recherche pour le Développement - IRD, Valbonne, France, (12)Géoazur - Université Côte d'Azur - IRD - CNRS - Observatoire de la côte d'Azur, Valbonne, France, (13)Géoazur - Université Nice Sophia Antipolis, Valbonne, France, (14)CEREMA, Laboratoire de Nice, Nice, France, (15)Stockholm, Sweden, (16)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (17)Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States, (18)Instituto Geofísico de la Escuela Politécnica Nacional, Quito, Ecuador, (19)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador
Evaluation of Earthquake-Induced Effects on Neighbouring Faults and Volcanoes: Application to the 2016 Pedernales Earthquake (268913)
Marta Bejar1, Jose Antonio Alvarez Gomez2, Alejandra Staller3, Marco P Luna4, Raul Perez Lopez5, Oriol Monserrat6, Kervin Chunga7, Gerardo Herrera8, Luis Jordá9, Aracely Lima10 and Jose J. Martínez-Díaz2, (1)Instituto Geologico y Minero Espana, Madrid, Spain, (2)Complutense University of Madrid, Department of Geodynamics, Stratigraphy & Paleontology, Madrid, Spain, (3)Universidad Politécnica de Madrid, Madrid, Spain, (4)Universidad Politécnica de Madrid, Ingeniería Topográfica y Cartografía, Madrid, Spain, (5)IGME - CSIC, Geological Hazards And Climate Change, Madrid, Spain, (6)Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Division of Geomatics, Remote Sensing Department, Castelldefels, Spain, (7)Facultad de Ciencias de la Ingeniería. Universidad Estatal, Ingeniería Civil, Península Santa Elena, Ecuador, (8)Instituto Geologico Minero Espana, MADRID, CDX, Spain, (9)Instituto Geologico Minero Espana, Madrid, Spain, (10)Instituto Nacional de Investigación Geológico Minero Metalúrgico, Quito, Ecuador
From the seismic cycle to long-term deformation: linking seismic coupling and Quaternary coastal geomorphology along the Andean megathrust (234131)
Marianne Saillard1, Laurence Audin2, Baptiste Rousset2, Jean-Philippe Avouac3, Mohamed Chlieh1, Sarah R Hall4, Laurent Husson5 and Daniel Farber6, (1)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d’Azur, Géoazur, Valbonne, France, (2)IRD, CNRS, Université Grenoble Alpes, ISTerre, Grenoble, France, (3)California Institute of Technology, Seismological Laboratory, Division of Geological and Planetary Sciences, Pasadena, CA, United States, (4)Climate Change Institute, Orono, ME, United States, (5)Université Grenoble Alpes, ISTerre, Grenoble, France, (6)Lawrence Livermore National Laboratory, Livermore, CA, United States
Basal erosion: barrier to earthquake propagation? Insight from the northern chilean forearc (238290)
Nadaya Cubas, Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, Paris, France
Preliminary 3D P-wave Seismic Velocity Structure in the Rupture Zone of the April 1, 2014 Pisagua, Chile Earthquake from Controlled Source Data (268172)
Kathy K Davenport, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Anne M Trehu, Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States and PICTURES Science Party
Lithospheric Structure of the Incoming Nazca Plate Adjacent to the 2014 Iquique Earthquake Rupture Zone (245457)
Emma K Myers, University of Washington, Earth and Space Sciences, Seattle, WA, United States, Anne M Trehu, Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Kathy K Davenport, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Emily C Roland, University of Washington, School of Oceanography, Seattle, WA, United States and PICTURES Science Team
Seismic images of the North Chilean subduction zone prior to the 2014 Iquique earthquake (212929)
Ina Storch, Freiberg University of Mining and Technology, Geophysics and Geoinformatics, Freiberg, Germany and Stefan Buske, Freiberg University of Mining and Technology, Freiberg, Germany
Analysis of the Intermediate-Depth Seismicity During the Year Preceding the 2014 Mw 8.2 Iquique Earthquake and its Possible Implication in the Megathrust Triggering Process (278573)
Florent Aden-Antoniow1, Claudio Satriano2, Pascal Bernard3, Natalia Poiata4, El-Madani Aissaoui4 and Jean-Pierre Vilotte4, (1)Massachusetts Institute of Technology, Boston, MA, United States, (2)Université Paris Cité, Institut de physique du globe de Paris, Sismologie, Paris, France, (3)Institut de Physique du Globe de Paris (IPGP), Université Paris Cité, Paris, France, (4)Institut de Physique du Globe de Paris, Paris, France
Seismic and Aseismic Slip Surrounding the 2014 Mw 8.2 Pisagua (Chile) rupture (265606)
Mahesh Narayan Shrivastava1,2, Gabriel Gonzalez1,2, Pablo Salazar3, Marcos Moreno4 and Juan Carlos Baez5, (1)Universidad Católica del Norte, Antofagasta, Chile, (2)National Research Center for Integrated Natural Disaster Management (RCINDIM/CIGIDEN), Santiago de Chile, Chile, (3)Millennium Institute on Volcanic Risk Research, Department of Geological Sciences, Antofagasta, Chile, (4)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (5)Universidad de Chile, Centro Simológical Nacional, Santiago, Chile
Recent GPS Surveys Reveal Coupling Complexities in the TalTal Area, Chile (24°S-26°S) : Consequences on Seismic Hazard in the Atacama-Antofagasta Regions. (215537)
Christophe Vigny, CNRS, Paris Cedex 16, France, Emilie Klein, Univ Strasbourg, IPGS, Strasbourg Cedex, France, Marianne Metois, LGLTPE Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement, Villeurbanne Cedex, France, Gianina Meneses, Ecole Normale Supérieure Paris, Paris, France and Arthur Delorme, Université de Paris, Institut de Physique du Globe de Paris, CNRS, Paris, France
Development of a Shallow Decollement Along the South-Central Chile Margin from 2D Seismic Reflection Data (258886)
Kelly Olsen, University of Texas at Austin, Austin, TX, United States, Nathan L Bangs, Univ Texas, Institute for Geophysics, Austin, United States, Adrien F Arnulf, Institute for Geophysics, Austin, United States, Anne M Trehu, Oregon State Univ, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, Eduardo Contreras Reyes, Universidad de Chile, Department of Geophysics, Santiago, Chile and The CEVICHE Science Party
Modelling the 3D post-seismic deformation signal of the Maule 2010 earthquake: Viscosity heterogeneity or non‑linear creep? (228418)
Carlos Peña1,2, Oliver Heidbach3, Marcos Moreno1, Dr. Shaoyang Li4, Jonathan R. Bedford5 and Onno Oncken6, (1)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (2)Free University of Berlin, Berlin, Germany, (3)GFZ German Research Centre for Geosciences, Potsdam, Germany, (4)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 3.1, Potsdam, China, (5)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany, (6)GeoForschungsZentrum GFZ, Potsdam, Germany

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