2022 SSA Session: "What Controls the Style of Fault Slip in Subduction Zones? "

Qingyu Wang qingyuwa at mit.edu
Wed Jan 5 16:49:52 UTC 2022

Dear all,

We would like to invite you to submit an abstract to the SSA 2022 session “What Controls the Style of Fault Slip in Subduction Zones?”.
The annual meeting of the 2022 seismological society of America will be held on 19-23 April in Bellevue, Washington. This will be a fully in-person conference with all presenters required to attend on-site. The abstract deadline is 12 January 2022 at 5 p.m. Pacific. You may submit the abstract via this link: (https://meetings.seismosoc.org/submit/).

Session Title: What Controls the Style of Fault Slip in Subduction Zones?

The heterogeneous structure of the plate boundary fault zone has a first-order impact on the style of fault slip that occurs at the subduction interface, both within the megathrust and neighboring regions of the seismogenic zone where slow earthquakes occur. For example, subducting seamounts appear to control the segmentation of the megathrust; at a smaller scale, tremor-generating seismic asperities are spatially stationary across multiple slow slip events that each have their own unique rupture evolution. Other controls on structure such as lithology, elevated pore fluid pressures and changing stress states can also play a role in determining faulting style. The outstanding question we would like to address is: what is the impact of subducting plate interface structure on the broad spectrum of faulting that is observed?

We seek abstracts that shed light on the impact of such fault structure (including but not limited to heterogeneity, lithology, pore fluid pressure and stress state) on the mode of fault slip. We welcome abstracts focused on individual aspects of structure and faulting dynamics, including but not limited to geophysical imaging, earthquake source, and numerical modeling studies, whose connections will be explored within the greater context of the session. Our hope is that this session will build off of, and contribute to, the momentum surrounding the community-driven Subduction Zones in 4 Dimensions (SZ4D) initiative.

Qingyu Wang, Massachusetts Institute of Technology (qingyuwa at mit.edu<mailto:qingyuwa at mit.edu>)
Alice Agnes-Gabriel, Ludwig Maximilian University of Munich (gabriel at geophysik.uni-muenchen.de<mailto:gabriel at geophysik.uni-muenchen.de>)
Keisuke Yoshida, Tohoku University (keisuke.yoshida.d7 at tohoku.ac.jp<mailto:keisuke.yoshida.d7 at tohoku.ac.jp>)
William B. Frank, Massachusetts Institute of Technology (wfrank at mit.edu<mailto:wfrank at mit.edu>)

Qingyu on behalf of the Conveners
Qingyu Wang
Postdoctoral researcher
Room 54-514
Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology
Cambridge, MA 02139, USA
Tel: (+1) 213-675-5461 / (+33) 6 01 12 21 94

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