2021 SSA Session: The 2020 Simeonof Island, Alaska, Earthquake: Observations, Modeling and Tectonic Insights

Brendan W Crowell crowellb at uw.edu
Mon Jan 11 20:17:40 UTC 2021

Dear Colleagues,

We would like to draw to your attention the following session at the 2021
SSA Annual Meeting. Abstracts are due 5 pm PST on Wednesday January 13.
Abstracts pertaining to the October M7.6 Sand Point, Alaska, earthquake are
also welcome.

*Title: *
The 2020 Simeonof Island, Alaska, Earthquake: Observations, Modeling
and Tectonic Insights

*Description: *In July 2020, a Mw 7.8 earthquake struck along the
Alaskan subduction zone at the edge of the Shumagin Gap, a region with
poorly coupled megathrust that has been devoid of large earthquakes
for the last century. The relation of the Simeonof Island earthquake
and its associated afterslip to plate coupling in the region is
important to determine the future tsunamigenic potential of the
subduction interface, of interest to both local and Pacific basin wide
communities. Moreover, understanding why seismic and aseismic slip
occurs in poorly coupled subduction zones is relevant to
characterizing hazards globally. Past events along the edges of the
Shumagin gap, most notably in 1936 and 1948, showed that shallow
megathrust slip is possible. Here we invite submissions that describe
the entire earthquake cycle within the Shumagin Gap, including but not
limited to: historical seismicity, preseismic deformation and
coupling, earthquake rupture modeling, aftershock monitoring and
forecasts, field observations, postseismic deformation, tsunami
observations and hazards implications.

*Conveners: *Brendan W. Crowell, University of Washington (crowellb at uw.edu)
Natalia Ruppert, University of Alaska Fairbanks (naruppert at alaska.edu)

Brendan Crowell
Research Scientist
Affiliate Assistant Professor
Pacific Northwest Seismic Network
Department of Earth and Space Sciences
University of Washington
crowellb at uw.edu crowellbw at gmail.com
(858) 750-8513
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