Scientists Map High-Risk Geologic Boundary in Pacific Northwest

Scientists Map Hazardous Cascadia Subduction Zone in Detail
Scientists have conducted an unprecedented mapping of the Cascadia subduction zone, a 600-mile geologic boundary off the Pacific Northwest coast, known for its potential to unleash catastrophic earthquakes and tsunamis. Utilizing a 235-foot research ship equipped with advanced sonar technology, researchers spent 41 days in 2021 mapping the underwater geology. This study, published in Science Advances, aims to better understand earthquake and tsunami scenarios, crucial for improving building codes and disaster preparedness.
The area, spanning from Northern California to Vancouver Island, is at risk, with the fault off Washington’s coast being particularly hazardous due to its flat, shallow, and smooth characteristics. Historical records, such as the 1700 earthquake, underscore the zone’s potential for significant seismic activity. The new data reveals complex fault features and identifies four segments that could rupture individually or collectively, posing varying levels of threat.
Scientists like Erin Wirth and Kelin Wang are already leveraging this data for better earthquake and tsunami risk assessments, highlighting the study’s crucial role in enhancing our understanding of this volatile region.