Toward an integrative geological and geophysical view of Cascadia subduction zone earthquakes

Annual Review of Earth and Planetary Sciences
By: , and 

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Abstract

The Cascadia subduction zone (CSZ) is an exceptional geologic environment for recording evidence of land level changes, tsunamis, and ground motion that reveals at least 19 great megathrust earthquakes over the past 10 kyr. Such earthquakes are among the most impactful natural hazards on Earth, transcend national boundaries, and can have global impact. Reducing the societal impacts of future events in the U.S. Pacific Northwest and coastal British Columbia, Canada requires improved scientific understanding of megathrust earthquake rupture, recurrence, and corresponding hazards. Despite substantial knowledge gained from decades of research, large uncertainties remain about the characteristics and frequencies of past CSZ earthquakes. In this review, we summarize geological, geophysical, and instrumental evidence relevant to understanding megathrust earthquakes along the CSZ and associated uncertainties. We discuss how the evidence constrains various models of great megathrust earthquake recurrence in Cascadia and identify potential paths forward for the earthquake science community.
Publication type Article
Publication Subtype Journal Article
Title Toward an integrative geological and geophysical view of Cascadia subduction zone earthquakes
Series title Annual Review of Earth and Planetary Sciences
DOI 10.1146/annurev-earth-071620-065605
Edition Online First
Volume 49
Year Published 2021
Language English
Publisher Annual Reviews
Contributing office(s) Pacific Coastal and Marine Science Center
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