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

Walton, MAL; Staisch, LM; Dura, T; Pearl, JK; Sherrod, B; Gomberg, J; Engelhart, SE; Trehu, A; Watt, J; Perkins, J; Witter, RC; Bartlow, N; Goldfinger, C; Kelsey, HM; Morey, AE; Sahakian, VJ; Tobin, H; Wang, K; Wells, R; Wirth, E

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Authors

MAL Walton

LM Staisch

T Dura

JK Pearl

B Sherrod

J Gomberg

A Trehu

J Watt

J Perkins

RC Witter

N Bartlow

C Goldfinger

HM Kelsey

AE Morey

VJ Sahakian

H Tobin

K Wang

R Wells

E Wirth



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 US 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.

Citation

Walton, M., Staisch, L., Dura, T., Pearl, J., Sherrod, B., Gomberg, J., …Wirth, E. (2021). Toward an integrative geological and geophysical view of Cascadia subduction zone earthquakes. Annual Review of Earth and Planetary Sciences, 49, 367-398. https://doi.org/10.1146/annurev-earth-071620-065605

Journal Article Type Article
Online Publication Date Jan 5, 2021
Publication Date 2021-05
Deposit Date Dec 14, 2020
Publicly Available Date Jan 5, 2022
Journal Annual Review of Earth and Planetary Sciences
Print ISSN 0084-6597
Electronic ISSN 1545-4495
Publisher Annual Reviews
Peer Reviewed Peer Reviewed
Volume 49
Pages 367-398
DOI https://doi.org/10.1146/annurev-earth-071620-065605

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