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Room: Tikahtnu Ballroom C

Date: 5/2/2024

Session Time: 2:00 PM to 3:15 PM (local time)

Efforts toward improving the resilience of urban environments to seismic hazards and associated geohazards are challenged by spatially variable ground motions and permanent ground deformations (e.g., due to co-seismic landslides or soil liquefaction). Regional-scale probabilistic seismic hazard and risk analyses are often used to evaluate large, distributed infrastructure systems such as pipelines and transportation networks in densely populated cities. While relevant work in the last decade has contributed toward multi-scale probabilistic modeling of regional ground shaking and deformation, important advances to support regional risk and loss assessments, financial loss considerations, and earthquake response tools remain missing. For instance, accurately characterizing the spatial variability of ground motions and their associated effects is important to capture the seismic risk of exposed communities in earthquake-prone areas, which is increasing with urbanization and, highly interdependent and aging infrastructure systems.           

Even though there are common aspects between site-specific and regional seismic hazard and risk analyses, the characterization of ground motions, geologic conditions, and losses present different challenges to the data collection and modeling efforts. For instance, subduction zones, from the deep inslab environments through the megathrust and shallow crustal faults, present significant challenges when it comes to bridging the gap between earthquake science and application. Thus, this session invites contributions on 1) simulations and analyses of spatiotemporal variations of ground motion and deformation at regional scales, 2) tools developed for earthquake scenarios that capture the spatial correlation of ground motions, 3) advances in earthquake early-warning systems and rapid post-earthquake assessments, 4) methods based on the integration of site-specific data and geospatial analytics, 5) regional-scale approaches to estimate the occurrence and uncertainty of ground failure, 6) regional scale portfolio asset risk analyses and methodologies, 7) regional scale exposure and vulnerability assessments, and 8) specific applications of subduction zone science for hazard and loss modeling.

Conveners:
Ashly Cabas, North Carolina State University (amcabasm@ncsu.edu)
John Cassidy, Geological Survey of Canada (john.cassidy@nrcan-rncan.gc.ca)
Rodrigo Costa, University of Waterloo (rodrigo.costa@uwaterloo.ca)
Cassie Gann-Phillips, North Carolina State University (cvgann@ncsu.edu)
Mike Greenfield, Greenfield Geotechnical (mike@greenfieldgeotechnical.com)
Tiegan E. Hobbs, Geological Survey of Canada (thobbs@eoas.ubc.ca)
James Kaklamanos, Merrimack College (kaklamanosj@merrimack.edu)
Albert Kottke, Pacific Gas and Electric Company (albert.kottke@pge.com)
Sabine Loos, University of Michigan (sloos@umich.edu)
Cristina Lorenzo-Velazquez, North Carolina State University (clorenz@ncsu.edu)
Andrew Makdisi, U.S. Geological Survey (amakdisi@usgs.gov)
Hong-Kie Thio, AECOM (hong.kie.thio@aecom.com)
Eric Thompson, U.S. Geological Survey (emthompson@usgs.gov)
David Wald, U.S. Geological Survey (wald@usgs.gov)
Erin Wirth, U.S. Geological Survey (emoriarty@usgs.gov)

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