Understanding Non-Traditional Seismic Tsunami Hazards [Poster]
Despite its intraplate and strike-slip source mechanism, the 2018 Palu earthquake had a large role in generating a deadly regional-scaled tsunami with run-up field measurements in excess of 4 m. In the Puget Sound and the Georgia Strait near Seattle, Washington, USA and Vancouver, British Columbia, Canada, paleoseismic investigations have begun to unearth shallow crustal faults which may be capable of generating locally damaging tsunami. Splay faults branching from the megathrust, normal faults in the outer rise, thrust faults in the accretionary wedge, strike slip events in plate interiors and seismic ground motion induced landsliding are all capable of generating tsunamis. Historically, however, the majority of tsunami modeling has focused exclusively on the shallow subduction interface. This can largely be attributed to past limits in computational power and our epistemic uncertainty in tsunamigenic processes. Advances in high-performance computing have eased the burden of running detailed and time-sensitive models, allowing for a richer view of seismic and tsunami source processes. Widespread attention, related to recent surprising earthquake and tsunami events, has increased capacity for studying an ever-expanding catalogue of faults and the cascading hazards that can result from their failure. Nevertheless, hazards from off-megathrust faults are currently underrepresented in traditional tsunami hazard assessments.
This session invites papers which aim to improve our limited understanding of the tsunamigenic impact beyond the shallow megathrust interface. Specifically, this session hopes to solicit studies using a broad range of geophysical, geological and oceanographic techniques to characterize non-traditional tsunamigenic processes, as well as estimate the risks imposed in terms of areal extent of impacts to populations and the built environment.
Conveners
Amy L. Williamson, University of Oregon (awillia5@uoregon.edu); Tiegan Hobbs, Natural Resources Canada (tiegan.hobbs@canada.ca); Valerie Sahakian, University of Oregon (vjs@uoregon.edu)
Poster Presentations
| Participant Role | Details | Action |
|---|---|---|
| Submission | Mapping and Modeling the Seattle Fault Tsunami Inundation in Puget Sound | View |
| Submission | Modeling Tsunami Wave Heights Around the Pacific Basin from an Izu-Bonin Mariana Earthquake and the Potential for Rewriting Earthquake History | View |
| Submission | Consideration of Non-Seismic Tsunami Sources for the US East Coast and Caribbean | View |
| Submission | New Field Insights Into the 2018 M7.5 Palu, Indonesia Earthquake and Tsunami and a Comparison with the 2009 M8.1 Samoa Event | View |
| Submission | Analytical Model for Tsunami Propagation Including Source Kinematics | View |
| Submission | Can Inelastic Wedge Deformation Explain the Large Tsunami Runup of the 1896 Sanriku Earthquake? | View |
| Submission | Progress of the Powell Center Working Group on Tsunami Sources | View |
Understanding Non-Traditional Seismic Tsunami Hazards [Poster]
Description