S24B:
Heterogeneity and Scaling Relations Impacting the Geomechanical Behavior of Fault Zones I


Submit an Abstract to this Session


Session ID#: 58789

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 Paul A Selvadurai, ETH Zurich, Swiss Seismological Service, Zurich, Switzerland
OSPA Liaison:  Martin Schoenball, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Co-Organized with:
Seismology, 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:

Asperity Distributions in Faults Based on Observed Fault Topography (Invited) (462246)
Emily E Brodsky, University of California Santa Cruz, Department of Earth and Planetary Sciences, Santa Cruz, CA, United States
Spatial and Temporal Variations of Upper Crustal Anisotropy Along the San Jacinto Fault Zone in Southern California: Constraints from Shear Wave Splitting Analysis (407481)
Enyuan Jiang, Missouri University of Science and Technology, Geology and Geophysics Program, Rolla, MO, United States, Kelly Hong Liu, Missouri University of Science and Technology, Earth Sciences and Engineering, Rolla, MO, United States, Yuan Gao, United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, Beijing, China and Stephen S Gao, Missouri University of Science and Technology, Earth Sciences and Engineering, Rolla, United States
A multi-scale approach for assessing the impacts of mechanical stratigraphy and structural controls on fluid flow across heterolithic fault zones (406539)
Hannah Beth Riegel1,2, Luca Mattioni3, Fabrizio Agosta2,4, Claudio Di Celma2,5 and Emanuele Tondi2,5, (1)University of Camerino, School of Science and Technology - Geology Division, Camerino, Italy, (2)Reservoir Characterization Project, www.rechproject.com, Camerino, Italy, (3)Neptune Oil & Gas, Paris, France, (4)University of Basilicata, Potenza, Italy, (5)University of Camerino, School of Science and Technology, Geology Division, Camerino, Italy
Fracture heterogeneity, fluid overpressure, and injection-induced seismicity (426290)
Wei Wu1, Yinlin Ji1 and Yunzhong Jia2, (1)Nanyang Technological University, School of Civil and Environmental Engineering, Singapore, Singapore, (2)Nanyang Technological University, Singapore, Singapore
Estimation of gradual stress changes before the 2016 Mw7.0 Kumamoto, Japan, earthquake (389102)
Akemi Noda1, Tatsuhiko Saito1, Eiichi Fukuyama2, Toshiko Terakawa3 and Mitsuhiro Matsu'ura4, (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, (3)Nagoya University, Nagoya, Japan, (4)Inst. Statistical Mathematics, Tokyo, Japan
Fluid-driven basement earthquake faulting during the 2013 Castor seismic sequence, Spain: heterogeneously overpressured fault zone? (389351)
Mikel Diez, University of Bristol, School of Earth Sciences, Bristol, United Kingdom and Sylvain Barbot, University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
Probabilistic approaches in earthquake rupture simulations (Invited) (346754)
Olaf Zielke, KAUST, Thuwal, Makkah, Saudi Arabia

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