S21E:
Heterogeneity and Scaling Relations Impacting the Geomechanical Behavior of Fault Zones Posters


Submit an Abstract to this Session


Session ID#: 46502

Session Description:
Heterogeneities in sub-surface properties make life as a geoscientist particularly challenging, but also keep it interesting. Variations of the state of stress driving the occurrence of earthquakes result, amongst others, from heterogeneous frictional and elastic properties, fracture networks with power-law size distribution, and fracture roughness. All of these are considered important ingredients in current explanations of earthquake properties such as their magnitude-frequency relation, slip distribution, or clustering in space-time, and are routinely assumed as input parameters of numerical models. However, observational and experimental evidence for the actual distributions of these quantities is often elusive. In this session, we welcome submissions that take quantitative approaches to characterizing subsurface heterogeneity pertaining to the geomechanical properties influencing the earthquake process. These may include experimental, observational, or theoretical work on the statistics of geomechanical properties, earthquakes, faults, and the stress field. Specifically, we encourage submissions on all scales from grain-size to basins or larger.
Primary Convener:  Martin Schoenball, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Conveners:  Paul A Selvadurai, ETH Zurich, Swiss Seismological Service, Zurich, Switzerland, Patricia Martínez-Garzón, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany and James D Kirkpatrick, Colorado State University, Fort Collins, United States
Primary Liaison:  Martin Schoenball, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Chairs:  Martin Schoenball, Lawrence Berkeley National Laboratory, Berkeley, CA, United States and Patricia Martínez-Garzón, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany
OSPA Liaison:  James D Kirkpatrick, Colorado State University, Fort Collins, United States
Co-Organized with:
Seismology, Mineral and Rock Physics, and Tectonophysics

Proposed Co-Organized Session with:
  • MR - Mineral and Rock Physics
  • T - Tectonophysics
Index Terms:

4475 Scaling: spatial and temporal [NONLINEAR GEOPHYSICS]
7218 Lithosphere [SEISMOLOGY]
7230 Seismicity and tectonics [SEISMOLOGY]
8164 Stresses: crust and lithosphere [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Multicomponent Model of Crustal Stress at Cajon Pass with Implications for Stress Field Heterogeneity (453313)
Elliott Conley Helgans, Louisiana State University, Baton Rouge, LA, United States, Karen M Luttrell, Louisiana State University and Agricultural & Mechanical College, Baton Rouge, United States and Bridget R Smith-Konter, University of Hawaiʻi at Mānoa, Earth and Planetary Sciences, Honolulu, United States
3D Absolute Stress Fields in the Source Region of the 1992 Landers Earthquake (353663)
Toshiko Terakawa, Nagoya University, Nagoya, Japan and Egill Hauksson, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
Are the Long Recurrence Intervals of Small Repeating Earthquakes due to the Slow Slip Rates of Small Fault Strands? (434097)
Joshua Richard Williams, University of Leeds, Leeds, LS2, United Kingdom, Jessica Hawthorne, University of Oxford, Oxford, United Kingdom and Olivier Lengliné, University of Strasbourg/CNRS, Strasbourg Cedex, France
Seismic Imaging of the West Napa Fault in Napa, California (364437)
Mark Goldman1, Rufus Catchings2, Joanne H Chan3, Robert R Sickler2, Johanna M Nevitt4 and Coyn Criley2, (1)USGS Western Regional Offices Menlo Park, Earthquake Science Center, Menlo Park, CA, United States, (2)U.S. Geological Survey, Earthquake Science Center, Moffett Field, United States, (3)U.S. Geological Survey, Earthquake Science Center, Mountain View, CA, United States, (4)Stanford University, 345 Middlefield Rd, Stanford, United States
Upper Crustal Structure and Velocities of the Hayward Fault Zone Determined From the 2016 East Bay Seismic Experiment (384787)
Luther M Strayer1, Rufus Catchings2, Joanne H Chan3, Richardson Ian4, Adrian McEvilly4, Mark Goldman5, Coyn Criley2 and Robert R Sickler2, (1)California State University East Bay, Department of Earth and Environmental Sciences, Hayward, United States, (2)U.S. Geological Survey, Earthquake Science Center, Moffett Field, United States, (3)U.S. Geological Survey, Earthquake Science Center, Mountain View, CA, United States, (4)California State University East Bay, Earth and Environmental Sciences, Hayward, CA, United States, (5)USGS, Earthquake Science Center, Moffett Field, United States
Variations in Seismogenic Thickness and Tectonic Stress Revealed by a Decade of Relocated Microseismicity from the Central Alpine Fault, New Zealand (403026)
Konstantinos Michailos1, Calum John Chamberlain1, Martha K Savage1 and John Townend2, (1)Victoria University of Wellington, Wellington, New Zealand, (2)Victoria University Wellington, Wellington, New Zealand
Experimental investigation of the effect of fault architecture on fluid pressurization due to injection (469364)
Tajudeen M Iwalewa1, Yaniv Edery2, James R Rice1 and David Weitz3, (1)Harvard University, John A. Paulson School of Engineering and Applied Sciences, Cambridge, MA, United States, (2)Harvard University, Cambridge, MA, United States, (3)Harvard University, Applied Physics, Cambridge, United States
The Impact of Fabric Evolution on Elastic Properties in Natural and Synthetic Clay-Rich Gouge (459151)
Abby Kenigsberg, Pennsylvania State University Main Campus, University Park, PA, United States, Demian M Saffer, Pennsylvania State University, University Park, United States, Chris Marone, Pennsylvania State University, Department of Geosciences, University Park, United States and Jacques Riviere, Pennsylvania State University, Engineering Science and Mechanics, University Park, PA, United States
Coupled Seismic Cycle - Earthquake Dynamic Rupture - Tsunami Models (453669)
Alice-Agnes Gabriel1, Joern Behrens2, Michael Bader3, Ylona van Dinther4, Tomy Gunawan5, Elizabeth Madden6, Leonhard Rannabauer7, Sebastian Rettenberger8, Thomas Ulrich9, Carsten Uphoff7, Stefan Vater2, Stephanie Wollherr10 and Iris van Zelst11, (1)Ludwig Maximilians Universitat Munchen, Munich, Germany, (2)University of Hamburg, Hamburg, Germany, (3)Technical University of Munich (TUM), Department of Informatics, Munich, Germany, (4)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands, (5)Ludwig Maximilian University of Munich, Department of Earth and Environmental Sciences, Munich, Germany, (6)Ludwig Maximilians University of Munich, Department of Earth and Environmental Sciences, Munich, Germany, (7)Technical University of Munich (TUM), Munich, Germany, (8)Technische Universität München (TUM), Munich, Germany, (9)Ludwig-Maximilians-Universität München, Department of Earth and Environmental Sciences, Munich, Germany, (10)Ludwig Maximilians University of Munich, Munich, Germany, (11)ETH Swiss Federal Institute of Technology Zurich, Department of Earth Sciences, Zurich, Switzerland

See more of: Seismology