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Room: Key Ballroom 10

Date: 4/17/2025

Session Time: 4:30 PM to 5:45 PM (local time)

Compiling Active Faults for Improved Hazard Modeling from Cascadia to Alaska 

Active faults refer to faults which are believed to be capable of rupturing again in the future, generally meaning they have demonstrated activity in the Late Quaternary. Identifying these faults is crucial for understanding seismic hazard, particularly at near-source distances. Unfortunately, identification is thwarted in regions with low strain rates, dense vegetation, recent glaciation, extensive anthropogenic reworking, and/or other complicating factors. This is particularly true in the forearc of the Cascadia subduction zone, Alaskan subduction zone, and intervening North American crust of British Columbia and the Yukon. Nonetheless, many recent studies have sought to better constrain the crustal faulting potential from the offshore region all the way to the eastern edge of the cordillera, as part of research within academia and industry.

This session seeks to bring together recent studies on active faults or their implications for seismic hazard and risk, including contributions in the field of paleoseismology, geodesy, seismology, marine acoustics, geochronology, and seismic hazard and risk modeling. Negative results and methodological submissions are welcomed, to contribute to a robust discussion on the difficulties of assembling a complete crustal fault map across this remote and rugged swath of western North America.

Conveners 

Tiegan E Hobbs, Natural Resources Canada (thobbs@eoas.ubc.ca)
Richard Styron, The Global Earthquake Model Foundation (richard.styron@globalquakemodel.org) 
Martin Zaleski, BGC Engineering (mzaleski@bgcengineering.ca)

Oral Presentations