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EMRP1.4/SM4.9/TS2.8

Mechanical heterogeneity and their transient evolution along fault zones (co-organized)
Convener: Hiroki Sone  | Co-Conveners: Marcos Moreno , Dietrich Lange 
Orals
 / Wed, 10 Apr, 10:30–12:00  / Room B3
Posters
 / Attendance Wed, 10 Apr, 17:30–19:00  / Blue Posters
Geophysical studies of recent well-monitored mega-earthquakes are revealing with an increasing resolution the complex mechanical heterogeneities along faults (differential locking behavior, differential rupture behavior, rheological and structural variations, among others). Furthermore, observations of various transient events (after slips, slow slips, tectonic tremors, LFEs) also evidence the temporal evolutional nature of fault systems. While fault heterogeneities seem to have first order controls on the pattern of strain accumulation/release and carry fundamental information about the mechanical setting of faults, we have limited physical and mechanical understanding of what causes these heterogeneities, their kinematics and transient evolution between major events, and how they ultimately influence the largest seismic events. We aim to integrate studies from various disciplines in order to compare different observations and provide insights into the physical and transient properties of fault heterogeneities and their relation to earthquakes. Contributions from geologists, seismologists, geodesists, experimentalists, and modelers are invited. Some suggested topics are:
* Roughness/asperities/geometry of faults
* Co-seismic slip inferred from seismic records of various frequencies and comparison
* Kinematics of fault slip in different periods of the earthquake cycle
* Spatiotemporal variation of seismicity and transient events, seismic vs. aseismic slip
* Seismic and electromagnetic attributes around faults from tomography
* Relation between fault heterogeneity and rock physical/rheological properties
* Numerical modeling of fault zone kinematics

Invited Speakers: Nadaya Cubas (CalTech), Stefan Wiemer (ETH), John McCloskey (Univ. of Ulster)