S001
Advancements in imaging earthquake source processes

Session ID#: 157826

Session Description:
Understanding of earthquake source physics and related hazards has been greatly enhanced by advancements in imaging earthquake ruptures, including the utilization of multi-geophysical observations, the implementation of dense array techniques, and the development of rupture inversion schemes. Promising future research directions include improving quantification of various observational uncertainties, robustly characterizing different source complexities, and isolating effects due to the Earth’s heterogeneous structures.

This session welcomes contributions on the imaging of earthquake source processes, including developments in source inversion methods and observations of recent significant earthquakes and sequences. In particular, we welcome contributions aiming to advance uncertainty quantification of inferred source models, and to assess fault and crustal structure impacts on the source models and associated physical interpretations. We solicit multidisciplinary studies that synergize observations from seismic, geodetic, and tsunami data, laboratory experiments, and earthquake geology.

Index Terms:

7215 Earthquake source observations [SEISMOLOGY]

Primary Convener:  Zhe Jia, California Institute of Technology, Pasadena, United States
Conveners:  Théa Ragon, Seismological Laboratory, California Institute of Technology, Pasadena, CA, United States, Elisa Tinti, Sapienza University of Rome, Rome, Italy and Ryo Okuwaki, University of Tsukuba, Tsukuba, Japan
Student/Early Career Convener:  Zhe Jia, California Institute of Technology, Pasadena, United States
 
Tolerance Estimation from Amplitude Observational Uncertainties for Faulting Parameters (1045250)
Victor Agaba1, Maddy Sita2 and Suzan van der Lee1, (1)Northwestern University, Earth and Planetary Sciences, Evanston, United States, (2)Tulane University of Louisiana, Earth and Environmental Science, New Orleans, United States
 
A Moment Tensor Inversion Scheme for Local Earthquakes: Application to Haida Gwaii (1045623)
Doriane Drolet and Michael G Bostock, University of British Columbia, Vancouver, BC, Canada
 
Resolving Finite Source Attributes of the Mw 6.4 Yangbi Earthquake Aftershock Sequence (1049850)
Shaodong Li, Haoran Meng and Chunquan Yu, Southern University of Science and Technology, Shenzhen, China
 
Finite-source Attributes of M4 to 5.5 Ridgecrest, California Earthquakes (1059309)
Wenyuan Fan, Scripps Institution of Oceanography, La Jolla, CA, United States, Haoran Meng, University of California San Diego, La Jolla, CA, United States, Daniel T Trugman, Los Alamos National Laboratory, Los Alamos, United States, Jeffrey Joseph McGuire, US Geological Survey, Menlo Park, CA, United States and Elizabeth S Cochran, U.S. Geological Survey, Earthquake Science Center, Pasadena, United States
 
Moment vs local magnitude scaling of small-to-medium earthquakes from seismic moment estimation of 10 years (2009-2018) of Italian seismicity (1071350)
Mariano Supino, Lauro Chiaraluce, Raffaele Di Stefano and Maddalena Michele, Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy
 
Local Magnitude estimation for 10 years of Italian seismicity (2009-2018) based on new peak-to-peak amplitudes calculation on digital waveforms, and CLASS catalog probabilistic locations. (1077636)
Raffaele Di Stefano, Barbara Castello, Lauro Chiaraluce, Maddalena Michele and Diana Latorre, Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy
 
Impact of trench bathymetry and water reverberation phases on back-projection images: from the 3D teleseismic synthetic perspective (1077988)
Zexin Wang, Peking University, Beijing, China and Han Yue, ITAG Institute of Theoretical and Applied Geophysics, Peking University, Beijing, China
 
Resolving slip directions in the finite fault inversion with the radiation-corrected empirical Green’s function (1078483)
Ritsuya Shibata and Naofumi Aso, Tokyo Institute of Technology, Tokyo, Japan
 
Estimating correlation lengths of megathrust events: A Bayesian model selection approach. (1078737)
Gabriel Marchant, Universidad Catolica de la Santisima Concepcion, Concepci�n, Chile, Roberto Benavente, Universidad Católica de la Santísima Concepción, Department of Civil engineering, Concepción, Chile; Research Center for Integrated Disaster Risk Management (RCINDIM/CIGIDEN), Santiago, Chile, Catalina Morales-Yáñez, Universidad Catolica de la Santisima Concepcion, Department of Civil engineering, Concepcion, Chile; Proyecto ACT192169, ANILLO PRECURSOR, Concepción, Chile, Jorge G. F. Crempien, Pontificia Universidad Católica de Chile, Deparment of Structural and Geotechnical Engineering, Santiago, Chile; CIGIDEN, Santiago, Chile and Valeria Becerra, Pontifical Catholic University of Chile, Santiago, Chile
 
Seismic Source Characteristics of the Indian Ocean Diffuse Deformation Zone (1084496)
Anil Earnest, CSIR Fourth Paradigm Institute, Bangalore, India
 
Comparisons of rupture processes for major earthquakes in the middle and south in Longitudinal Valley, Eastern Taiwan. (1086486)
Wei-Yu Zhang, 桃園, 台灣, TAIWAN, Po-Fei Chen, National Central University, Taoyuan, Taiwan and Ming-Che Hsieh, Sinotech Engineering Consultants, Disaster Prevention Technology Research Center, Taipei, Taiwan
 
Stress drop variations of small aftershocks after the 2016 Pedernales earthquake (Ecuador) (1086906)
Caroline Chalumeau, Université Côte d’Azur, CNRS, IRD, OCA, Géoazur, Valbonne, France, Hans Agurto-Detzel, Karlsruhe Institute of Technology, Karlsruhe, Germany, Louis De Barros, Université Côte d'Azur, CNRS, IRD, OCA, Géoazur, Sophia Antipolis, France, Philippe Charvis, Géoazur - Université Côte d'Azur, IRD, CNRS, OCA, Valbonne, France and Rapid response team of the 2016 Pedernales earthquake
 
Deep earthquake source properties from inversion of both high- and low-frequency waveforms at teleseismic distances (1100059)
Zhe Jia1, Peter M Shearer2 and Wenyuan Fan1, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Univ California San Diego, La Jolla, CA, United States
 
Imaging a Complex Earthquake Sequence in Sparta, North Carolina, Eastern United States (1101271)
Miguel Neves1, Lindsay Yuling Chuang1, WeI Li2, Zhigang Peng3 and Sidao Ni4, (1)Georgia Institute of Technology, Earth and Atmospheric Sciences, Atlanta, United States, (2)University of Science and Technology of China, Hefei, China, (3)Georgia Institute of Technology, Earth and Atmospheric Sciences, Atlanta, GA, United States, (4)Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China
 
Estimate the source properties of foreshocks that occurred during stick-slip experiments using the 4-meter-long biaxial rock friction apparatus (Invited) (1101827)
Kurama Okubo1, Futoshi Yamashita1 and Eiichi Fukuyama1,2, (1)National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan, (2)Kyoto University, Department of Civil and Earth Resources Engineering, Graduate School of Engineering, Kyoto, Japan
 
A Large Fault Partially Reactivated During Two Contiguous Seismic Sequences in Central Italy: the Role of Geometrical and Frictional Heterogeneities (1104761)
Maria Eugenia Locchi1, Laura Scognamiglio2, Elisa Tinti1 and Cristiano Collettini1, (1)Sapienza University of Rome, Rome, Italy, (2)Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
 
The 2021 Mw 8.2 Alaska Peninsula Earthquake: Compressional Initial Rupture Induces Subsequent Extensional Coseismic Rupture (1104956)
Bonan Cao1, Chunmei Ren1, Zengxi Ge1, Han Yue1 and Jianghui Geng2, (1)ITAG Institute of Theoretical and Applied Geophysics, Peking University, Beijing, China, (2)Wuhan University, Wuhan, China
 
Class ‘Cars: High-Resolution Earthquakes Catalogs of 1981-2018 Italian Seismicity (1107026)
Maddalena Michele1, Raffaele Di Stefano2, Diana Latorre2, Barbara Castello2 and Lauro Chiaraluce2, (1)National Institute of Geophysics and Volcanology, Rome, Italy, (2)Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy
 
An Investigation of Microseismicity During the 2018 Kīlauea Caldera Collapse (1109944)
Isabella Metts, Michigan Technological University, Geological & Mining Engineering & Sciences, Houghton, United States and Gregory P Waite, Michigan Technological University, Geological & Mining Engineering & Sciences, Houghton, MI, United States
 
Source Characterization of the M6.4 Mainshock in the 2020 Southwestern Puerto Rico Seismic Sequence with Seismic and Geodetic Observations (1111225)
Margarita M Solares, University of Oregon, Eugene, OR, United States, Dara E Goldberg, USGS National Earthquake Information Center, Golden, United States, William L Yeck, USGS National Earthquake Information Center Golden, Golden, CO, United States and Diego Melgar, University of Oregon, Department of Earth Sciences, Eugene, OR, United States
 
A Stochastic Approach to the Characterization of the Seismic Source of Historical and Paleotsunami (1111514)
Ignacia Calisto1, Rodrigo Cifuentes-Lobos1, Breanyn T MacInnes2, Marcos Moreno3, Jorge Quezada1, Javiera San Martín1 and Matías Fernández1, (1)University of Concepcion, Concepcion, Chile, (2)Central Washington University, Ellensburg, WA, United States, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
 
Frictional weakening leads to unconventional singularities during laboratory earthquakes (Invited) (1116779)
Federica Paglialunga1, Francois Passelegue2, Mathias Lebihain3 and Marie Violay1, (1)Swiss Federal Institute of Technology Lausanne, LEMR, Lausanne, Switzerland, (2)Géoazur, Université de Côte d'Azur, Nice, France, (3)École Nationale des Ponts et Chaussées, Laboratoire Navier, Paris, France
 
Variability in finite-fault slip models of the 2011 Tohoku-Oki earthquake and implications for observationally constrained dynamic rupture simulations (1120029)
Jeremy Wing Ching Wong1, Wenyuan Fan1 and Alice-Agnes Gabriel2, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Ludwig-Maximilians-Universität, Earth and Environmental Sciences, Munich, Germany
 
The SCEC/USGS Community Stress Drop Validation Study using the 2019 Ridgecrest Earthquake Sequence Data (1123886)
Shanna Chu, Annemarie Baltay, U.S. Geological Survey, Earthquake Science Center, Moffett Field, United States, Rachel E Abercrombie, Boston University, Boston, MA, United States and Taka'aki Taira, Univ California Berkeley, Berkeley, United States
 
Imaging large earthquakes in the southern hemisphere with core-phase back-projections (1125936)
Liuwei Xu and Lingsen Meng, University of California Los Angeles, Earth, Planetary and Space Sciences, Los Angeles, United States
 
Global Evaluation of Large Strike-Slip Ruptures Using a Bayesian Estimation of Stress Glut Second Moments (1129050)
James Atterholt, California Institute of Technology, Pasadena, CA, United States and Zachary E. Ross, California Institute of Technology, Seismological Laboratory, Pasadena, United States
 
Source Parameters of the 2015 Alor Island, Indonesia Earthquake from ALOS-2 InSAR data (1131934)
Karlee Rivera, University of California Riverside, Riverside, CA, United States and Gareth Funning, University of California, Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States
 
Resolving Directivity of Small Earthquakes in the Stable Continental Region: A Case of 2021 Gwangyang, Korea Microearthquake Sequence (1135331)
Min Seong Seo1, Won-Young Kim2 and Younghee Kim1, (1)Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South), (2)Lamont-Doherty Earth Observatory, Palisades, NY, United States
 
Source Complexity of the 2021 MW 4.9 Offshore Jeju Island, Korea, Earthquake (1135411)
Sangwoo Han, Seoul National University, Seoul, Korea, Republic of (South), Won-Young Kim, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Younghee Kim, Seoul National University, School of Earth and Environmental Sciences, Seoul, Korea, Republic of (South)
 
Estimation of Source Parameters of Local Earthquakes originated near Idukki Reservoir, Kerala (1143078)
Ritima Das, Pondicherry University, Pondicherry, India, Utpal Saikia, Indian Institute of Science Education and Research Pune, Earth and Climate Science, Pune, India, Himanshu Mittal, National Cheng Kung University, Department of Earth Sciences, Tainan, Taiwan and Anjaly S Menon, Indian Institute of Science Education & Research Tirupati, Department of Earth and Climate Science, Tirupati, India
 
A Bayesian perspective of the 2007 Mw 7.7 Tocopilla, Chile, Earthquake using geodetic data and accounting for epistemic uncertainties (1148997)
Natalia Patricia Díaz1, Francisco Ortega-Culaciati1, Javier A Ruiz1, Mark Simons2 and Sarah E Minson3, (1)Universidad de Chile, Departamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Santiago, Chile, (2)Seismological Laboratory, California Institute of Technology, Pasadena, United States, (3)U.S. Geological Survey, Earthquake Science Center, Moffett Field, United States
 
A triggered yet concurrent multi-fault rupture at the Mendocino Triple Junction challenges the definition of an earthquake (1154285)
William L Yeck1, David R Shelly1, Kathryn Materna2, Dara E Goldberg1 and Paul S Earle1, (1)USGS National Earthquake Information Center, Golden, United States, (2)USGS Earthquake Science Center, Moffett Field, United States
 
Imaging Induced Seismicity Locations and Updating Seismic Velocity Models with Wave-equation Methods for a Large-N Nodal Array Dataset in Northern Oklahoma, USA (1156204)
Chenglong Duan, University of Texas at Dallas, Geosciences, Richardson, TX, United States and David E Lumley, University of Texas at Dallas, Geophysics, Physics, Richardson, TX, United States
 
Depth-dependent variation of proportionality between stress drop and slip, with implications for estimating megathrust earthquake source parameters (1183769)
Baoning Wu, University of Southern California, Department of Earth Sciences, Los Angeles, United States, Christodoulos Kyriakopoulos, University of Memphis, Center for Earthquake Research and Information, Memphis, United States, David Douglas Oglesby, University of California, Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States and Kenny J Ryan, Air Force Research Laboratory Albuquerque, Albuquerque, United States
 
Theoretical Approach for Earthquake Magnitude Determination Using A Combination of GNSS and Seismic Data (1185254)
Dorian Golriz1, Barry Hirshorn2, Yehuda Bock1, Stuart Weinstein3 and Jonathan R. Weiss4, (1)Scripps Institution of Oceanography, Institute of Geophysics and Planetary Physics, La Jolla, CA, United States, (2)Seismologist, Kapolei, Hawaii, United States, (3)NOAA/NWS/Pacific Tsunami Warning Center, Honolulu, HI, United States, (4)NOAA/NWS/Pacific Tsunami Warning Center, Honolulu, United States
 
Seismic moment tensor estimation and uncertainty quantification in 1D and 3D Earth models using regional waveforms with application to the Middle East (1189460)
Felix Rodrigo Rodriguez Cardozo1, Jochen Braunmiller2, Glenn Thompson2, Daniel Graybeal2, Julien Thurin3, Liang Ding4, Qinya Liu4, Ryan Modrak5 and Carl Tape3, (1)University of South Florida Tampa, School of Geosciences, Tampa, United States, (2)University of South Florida Tampa, School of Geosciences, Tampa, FL, United States, (3)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (4)University of Toronto, Department of Physics, Toronto, ON, Canada, (5)Los Alamos National Laboratory, Los Alamos, United States
 
Application of Sparse Methods for Estimating Coseismic Slip Distribution from Geodetic Observations of Surface Deformation (1196569)
Eric Szymanski, University of Michigan, Earth & Env. Sci., Ann Arbor, United States and Eric Hetland, University of Michigan Ann Arbor, Ann Arbor, MI, United States
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