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  Information - TS4.1 Frictional heating and earthquake rupture dynamics: integration of field, laboratory and theoretical studies (co-listed in SM)

Event Information
Understanding the evolution of frictional resistance during coseismic slip is a major goal of many recent studies in different research fields (theoretical simulations, laboratory experiments and geological observations). Distinct physical processes (including flash heating, melt-lubrication, thermal pressurization ...) affect dynamic fault weakening mechanisms and therefore control the dynamic frictional resistance. In this session we will explore the role of frictional heating on earthquake ruptures and the partitioning of the mechanical work spent during seismic faulting between heat and surface energy.
Given the interdisciplinary nature of the problem, we encourage contributions from:
1) Experimental and field (from exhumed to drilled seismogenic faults) studies to constrain the: (i) evidence of frictional heating in natural fault rocks (pseudotachylite, FT and ESR signals, mineral decomposition, etc.); (ii) thickness and roughness of the slipping zone; (iii) porosity, permeability, clast size distribution and mineralogy of the fault rock assemblage; (iv) coseismic pore pressure perturbations, permeability variations and dilatancy; (v) dynamic traction evolution, slip weakening distance, fracture energy, etc.
2) Seismological studies (both observational and theoretical) and numerical models to constrain: (i) seismic source parameters (fracture energy, slip weakening distance, breakdown stress drop, etc.); (ii) thermal and mechanical conditions on a fault plane during coseismic slip and (iii) rupture dynamic models to represent the macroscopic behavior of fault zone structures.

We encourage submitting contributions that focus on these physical problems providing evidence as well as theoretical and/or observational constraints.

Preliminary List of Solicited Speakers


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