[unav_all] AGU Session: Illuminating factors that determine subduction megathrust slip style
L.Wallace at gns.cri.nz
Wed Jul 23 09:10:51 MDT 2014
we would like to encourage you to submit your abstracts to our session "Illuminating the Factors that Determine Subduction Megathrust Fault Slip Style" at the 2014 AGU Fall Meeting, 15-19 December, San Francisco, USA.
This session is intended be an interdisciplinary effort to discuss potential physical controls on the diversity of fault slip behavior observed at subduction zones. We also encourage contributions addressing the continuum of fault slip behaviors including aseismic creep, transient slow slip events, and slip in great megathrust earthquakes.
Jean-Paul Ampuero (California Institute of Technology)
Donald Fisher (Penn State University)
Shuichi Kodaira (JAMSTEC)
Thorne Lay (University of California, Santa Cruz)
"Illuminating the factors that determine subduction megathrust fault slip style"
The subduction thrust interface varies in fault slip style, in space and time, through a continuum of slip velocities from steady creep to episodic seismic slip. Geodetic and seismological studies are increasingly illuminating the distribution of these slip styles, but the physical controls on the seismic style of any megathrust segment remain elusive. Several competing hypotheses exist; for example. observations and theoretical models indicate that slow slip and tremor may require high fluid pressures, sea floor roughness has been suggested to both promote and inhibit large earthquakes, and high effective stress may either promote or inhibit creep. It is clear that interdisciplinary discussion on how to test new and existing theories is required. We invite contributions from geodesy, seismology, numerical and analogue modeling, laboratory experiments, and field geology, that address the rheology, frictional properties, and physical characteristics that determine subduction megathrust fault slip style.
Ake Fagereng -
University of Cape Town/Cardiff University
Matt Ikari -
MARUM, University of Bremen
Kohtaro Ujiie - University of Tsukuba
Laura Wallace -
University of Texas at Austin
The session is sponsored by Tectonophysics, and co-sponsored by Geodesy, Minerals and Rock Physics, Natural Hazards, and Seismology.
Best regards and hope to see you in San Francisco!
Ake Fagereng, Matt Ikari, Kohtaro Ujiie, and Laura Wallace
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