T004
Advances in Methods for Observing and Modeling Seismic and Aseismic Processes

Session ID#: 79655

Session Description:
Our ability to resolve aspects of the earthquake cycle continues to improve with the ongoing development of new geodetic and modeling techniques. To understand short-term and long-term tectonic processes in a complex earth, it is crucial to 1) correctly separate the contributions made by seismic, aseismic and non-tectonic deformation in data, and then 2) link these observations to fault and bulk processes with a view of their spatiotemporal complexities and interactions. We welcome new contributions on: improved methods detect the signals of interest, new techniques to invert these signals for robust interpretations of the physical processes driving them (e.g. seismic vs. aseismic slip, off-fault deformation, etc.), advances in modeling these processes using realistic physics, and any combination of these and similar topics. The aim is to provide an environment in which the observational and modeling communities can discuss our understanding of seismic and aseismic processes and the development new approaches.
Index Terms:

1209 Tectonic deformation [GEODESY AND GRAVITY]
1294 Instruments and techniques [GEODESY AND GRAVITY]
8118 Dynamics and mechanics of faulting [TECTONOPHYSICS]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]

Primary Convener:  Kali L Allison, University of Maryland College Park, College Park, MD, United States
Conveners:  Jessica R Murray, US Geological Survey, Earthquake Science Center, Menlo Park, CA, United States, Adriano Gualandi, California Institute of Technology, Geological and Planetary Sciences, Pasadena, CA, United States; NASA Jet Propulsion Laboratory, Pasadena, CA, United States and Christopher Rollins, Caltech, Los Angeles, CA, United States
Primary Liaison:  Christopher Rollins, University of Leeds, Leeds, United Kingdom
 
Joint estimates of co-seismic slip and early afterslip: neglecting early afterslip may bias co- and post-seismic slip models (491380)
Théa Ragon1,2, Anthony Sladen3, Quentin Bletery4, Mathilde Vergnolle1, Olivier Cavalié1, Antonio Avallone5, Julien Balestra6, Bertrand Delouis1 and Mark Simons7, (1)Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Valbonne, France, (2)California Institute of Technology, Pasadena, United States, (3)Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Sophia-Antipolis, France, (4)Université Côte d’Azur, IRD, CNRS, Observatoire de la Côte d'Azur, Géoazur, Valbonne, France, (5)Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy, (6)Université Côte d’Azur, Valbonne, France, (7)California Institute of Technology, Pasadena, CA, United States
 
From intraplate to interplate earthquakes, a complex mixing of slip processes: Iquique Mw 8.1 Northern Chile 2014 as a study case (Invited) (498217)
Jorge Jara1, Anne Socquet2, Romain Jolivet1, Jesus Pina Valdes2, Fabrice Cotton3, Andrea Walpersdorf2, Nathalie Cotte2, David Marsan2 and Michel Bouchon2, (1)Ecole Normale Supérieure Paris, Département de Géosciences, Paris, France, (2)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
 
Refining the 2018 Mw 7.5 Papua New Guinea Earthquake Slip Distribution Using Sub-Pixel Offset (499342)
Jeng Hann Chong, California State University Northridge, Northridge, CA, United States and Mong-Han Huang, University of Maryland, College Park, College Park, MD, United States
 
Permanent Co-seismic Deformation of the 2013 Mw7.7 Baluchistan, Pakistan Earthquake From High-resolution Surface Strain Tensors (502298)
Guo Cheng, University of Iowa, Iowa City, IA, United States and William D Barnhart, USGS National Earthquake Information Center Golden, Golden, CO, United States
 
Towards Bridging the Coseismic and Postseismic Phases: Insights from Imaging Very Early Afterslip of the 2016 Pedernales Earthquake in Ecuador (Invited) (502959)
Louisa L Tsang1, Mathilde Vergnolle1, Cedric Twardzik1, Anthony Sladen2, Jean Mathieu Nocquet1, Frederique Rolandone3, Hans Agurto-Detzel1, Olivier Cavalié1,4, Paul Jarrin1,5 and Patricia A Mothes5, (1)Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Valbonne, France, (2)Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Sophia-Antipolis, France, (3)Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, Paris, France, (4)Université de Lyon, UCBL, CNRS, LBL-TPE, Villeurbanne, France, (5)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador
 
Do Slow Slip Events Trigger Great Megathrust Earthquakes? (505499)
Claudio Petrini1, Luca Dal Zilio2 and Taras Gerya1, (1)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, (2)California Institute of Technology, Pasadena, United States
 
Fault rheology of the Muji fault inferred from postseismic deformation after the 2016 Mw6.6 Aketao, northeast Pamir, earthquake (511268)
Bin Zhao1, Jie Li2, Dongzhen Wang1, Wenbin Xu3 and Roland Burgmann4, (1)Institute of Seismology, China Earthquake Administration, Wuhan, China, (2)University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, MI, United States, (3)Central South University, Changsha, China, (4)Univ California Berkeley, Seismological Laboratory, Berkeley, CA, United States
 
High precision timing of permanent surface dislocation in regional distance after a megathrust earthquake (513964)
Ilgoo Kim and Tae-Kyung Hong, Yonsei University, Seoul, Korea, Republic of (South)
 
Geodetic imaging of the stress shadow: large slip deficit on shallow megathrusts (514924)
Eric Ostrom Lindsey1, Rishav Mallick1, Judith Hubbard1, Roland Burgmann2 and Emma Hill3, (1)Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore, (2)Univ California Berkeley, Seismological Laboratory, Berkeley, CA, United States, (3)Asian School of the Environment, Nanyang Technological University, Singapore, Singapore
 
Independent Component Analysis and parametric approach for source separation in InSAR time-series at regional scale: application to 2017 - 2018 Slow Slip Event in Guerrero (Mexico) (514945)
Louise Maubant1, Erwan Pathier2, Simon Daout3, Mathilde Radiguet4, Marie-Pierre Doin4, Ekaterina Kazachkina5, Vladimir Kostoglodov6, Nathalie Cotte1 and Andrea Walpersdorf1, (1)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (2)University Joseph Fourier Grenoble, Grenoble Cedex 9, France, (3)University of Kiel, Kiel, Germany, (4)Université Grenoble Alpes, Grenoble, France, (5)National Autonomous University of Mexico, Ciudad DE Armería, Mexico, (6)UNAM, Instituto de Geofisica, Mexico City, Mexico
 
Slow Slip Events in Costa Rica Detected by GPS Observations, 2015-2019 (525229)
Mahsa Afra1, Esteban J. Chaves2, Cyril Muller3, Mitchell Scott Hastings4, Surui Xie4, Marino Protti2, Rocco Malservisi4 and Timothy H Dixon4, (1)University of South Florida Tampa, School of Geosciences, Tampa, FL, United States, (2)Observatorio Vulcanológico y Sismológico de Costa Rica, Heredia, Costa Rica, (3)Observatorio Vulcanológico y Sismológico de Costa Rica (OVSICORI), Heredia, Costa Rica, (4)University of South Florida, School of Geosciences, Tampa, FL, United States
 
Disentangling overprinted postseismic transient signals in GPS position time series: 12 years of data since the M­w 7.7, 2007 Tocopilla earthquake in northern Chile (525706)
Phillip Kenneth McFarland, University of Arizona, Tucson, AZ, United States and Rick A Bennett, Univ Arizona, Tucson, AZ, United States
 
Imaging Slow-slip Events in Costa Rica (529446)
Krittanon Sirorattanakul1, Adriano Gualandi2 and Jean-Philippe Avouac1, (1)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, (2)NASA Jet Propulsion Laboratory, Pasadena, CA, United States
 
How the deformation is accommodated and distributed within active fault zones? Insights from satellite geodesy and realistic fault modeling (551032)
Mathilde Marchandon1, James Hollingsworth1, Mathilde Radiguet2 and Kenneth W Hudnut3, (1)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (2)Université Grenoble Alpes, Grenoble, France, (3)USGS, Pasadena, CA, United States
 
Detecting and Reducing the Effect of Ongoing Postseismic Deformation in Modern GPS Time Series Using a Hybrid Forward/Inverse Method in Southern California (552168)
Katherine Anna Guns, University of Arizona, Department of Geosciences, Tucson, AZ, United States and Rick A Bennett, University of Arizona, Tucson, AZ, United States
 
Characterizing Episodic Tremor and Slip in Cascadia (561727)
Noel M Bartlow, University of California Berkeley, Berkeley, CA, United States and Charles A Williams Jr, GNS Science, Lower Hutt, New Zealand
 
Deformation transients before the 2011 Tohoku-Oki Megathrust Earthquake : What does the GPS tell? (562017)
Anne Socquet1, Lou Marill2, David Marsan1, Baptiste Rousset3, Mathilde Radiguet2,4, Roland Burgmann5, Nathalie Cotte1 and Michel Bouchon6, (1)ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, (2)ISTerre Institute of Earth Sciences, Grenoble, France, (3)University of California, Berkeley, Earth and Planetary Sciences, Berkeley, CA, United States, (4)Université Grenoble Alpes, Grenoble, France, (5)Univ California Berkeley, Seismological Laboratory, Berkeley, CA, United States, (6)ISTERRE, Grenoble, France
 
Distinguishing the Coseismic Phase of the Crustal Deformation Cycle with Seismogeodesy: Implications for Modeling Crustal Processes and Early Warning (562134)
Dorian Golriz1, Yehuda Bock1 and Dara Goldberg2, (1)Scripps Institution of Oceanography, Institute of Geophysics and Planetary Physics, La Jolla, CA, United States, (2)University of Oregon, Department of Earth Sciences, Eugene, OR, United States
 
Identification of seismogenic zones from GNSS data: an example of Kyushu Island, Japan (569210)
Xiangyi An, Korea University, Seoul, Korea, Republic of (South), Sungshil Kim, Korea Univ., Seoul, Korea, Republic of (South) and Jin-Han Ree, Korea University, Department of Earth and Environmental Sciences, Seoul, South Korea
 
Identifying vertical and horizontal components of surface displacement along the Maacama and Rodgers Creek faults using InSAR (570982)
Jerlyn L Swiatlowski, University of California Riverside, Riverside, CA, United States, Gareth Funning, University of California, Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States and David P Bekaert, JPL/NASA/Caltech, Pasadena, United States
 
Feasibility of the GNSS carrier phase to fault slip approach for estimation of coseismic and postseismic slip phenomena: a case study of the 2011 Tohoku-Oki sequence (571628)
Yusuke Tanaka1, Yusaku Ohta1 and Shin'ichi Miyazaki2, (1)Tohoku University, Graduate School of Science, Sendai, Japan, (2)Kyoto University, Kyoto, Japan
 
Coseismic displacements and finite fault inversions of a triplet of Mw ~6 Hojedk earthquakes on December 2017 using geodetic data from radar and optical images (581258)
Yingwen Zhao, Caijun Xu and Yangmao Wen, School of Geodesy and Geomatics, Wuhan University, Wuhan, China
 
Splay fault rupture dynamics and off-fault deformation constrained by geodynamic subduction modelling (585204)
Iris van Zelst, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, Alice-Agnes Gabriel, Ludwig-Maximilians-Universität, Munich, Germany and Ylona van Dinther, Utrecht University, Earth Sciences, Utrecht, Netherlands
 
The Community Code Verification Exercise for Simulating Sequences of Earthquakes and Aseismic Slip (SEAS) (603959)
Brittany A Erickson1, Junle Jiang2, Michael Barall3, Nadia Lapusta4, Eric M Dunham5, Ruth Harris6, Lauren S Abrahams7, Kali L Allison8, Jean-Paul Ampuero9, Prof. Sylvain Barbot10, Camilla Cattania11, Ahmed E Elbanna12, Yuri A Fialko13, Benjamin Idini14, Jeremy Edward Kozdon15, Valere Lambert14, Yajing Liu16, Yingdi Luo17, Xiao Ma12, Paul Segall18, Pengcheng Shi19, Martijn van den Ende20, Maricela Best Mckay21 and Meng (Matt) Wei22, (1)University of Oregon, Eugene, OR, United States, (2)Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, (3)Invisible Software, San Jose, CA, United States, (4)Calif Inst of Tech, Pasadena, CA, United States, (5)Stanford University, Geophysics, Stanford, CA, United States, (6)U.S. Geological Survey, Earthquake Science Center, Menlo Park, CA, United States, (7)University of Wisconsin Madison, Madison, WI, United States, (8)University of Maryland College Park, College Park, United States, (9)Géoazur - Université Nice Sophia Antipolis, Valbonne, France, (10)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (11)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany, (12)University of Illinois at Urbana Champaign, Urbana, IL, United States, (13)Univ California San Diego, La Jolla, CA, United States, (14)California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, (15)Naval Postgraduate School, Monterey, CA, United States, (16)McGill University, Montreal, QC, Canada, (17)Jet Propulsion Laboratory, Caltech, Pasadena, CA, United States, (18)Stanford University, Stanford, CA, United States, (19)University of Rhode Island, Narragansett, RI, United States, (20)Géoazur-Université Côte d'Azur, Sophia Antipolis, France, (21)Portland State University, Portland, United States, (22)University of Rhode Island Narragansett Bay, Narragansett, RI, United States
 
Impact of 3D Green's Functions with Topography on Coseismic Slip Model Inversions (611082)
Leah Langer1, Théa Ragon2,3, Anthony Sladen4 and Jeroen Tromp1, (1)Princeton University, Princeton, NJ, United States, (2)California Institute of Technology, Pasadena, United States, (3)Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Valbonne, France, (4)Geoazur - CNRS, Valbonne, France
 
Was the 2011 Mw 9.0 Tohoku‐Oki Earthquake Preceded by a Massive Slab Deformation Event? (618749)
Lei Wang, Ohio State University Main Campus, Columbus, OH, United States and Roland Burgmann, Univ California Berkeley, Seismological Laboratory, Berkeley, CA, United States
 
Numerical Simulations of Stress Variations with Depth in a Model for the San Jacinto Fault Zone (624041)
Niloufar Abolfathian1, Christopher W Johnson2 and Yehuda Ben-Zion1, (1)University of Southern California, Los Angeles, CA, United States, (2)University of California Berkeley, Berkeley, CA, United States
 
Bayesian Inverse Modeling of Postseismic Deformation Following the 2011 Tohoku-oki Earthquake Using Mechanically Coupled Models of Coseismic Slip, Stress-Driven Afterslip, and Viscoelastic Relaxation (632125)
Junichi Fukuda, University of Tokyo, Tokyo, Japan and Kaj M Johnson, Indiana University, Bloomington, IN, United States
 
Transient creep on the Concord Fault, Eastern Bay Area, revealed by InSAR time series (633364)
Ekaterina Tymofyeyeva, Jet Propulsion Laboratory, Pasadena, CA, United States, Piyush S. Agram, NASA Jet Propulsion Laboratory, Pasadena, CA, United States, Heresh Fattahi, University of Miami, Rosenstiel School of Marine and Atmospheric Science, Miami, FL, United States and David P Bekaert, JPL/NASA/Caltech, Pasadena, United States
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