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

Walton, MAL and Staisch, LM and Dura, T and Pearl, JK and Sherrod, B and Gomberg, J and Engelhart, SE and Trehu, A and Watt, J and Perkins, J and Witter, RC and Bartlow, N and Goldfinger, C and Kelsey, HM and Morey, AE and Sahakian, VJ and Tobin, H and Wang, K and Wells, R and Wirth, E (2021) 'Toward an integrative geological and geophysical view of Cascadia subduction zone earthquakes.', Annual Review of Earth and Planetary Sciences, 49 . pp. 367-398.

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.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1146/annurev-earth-071620-065605
Publisher statement:Posted with permission from the Annual Review of Earth and Planetary Sciences, Volume 49 © by Annual Reviews, http://www.annualreviews.org.
Date accepted:No date available
Date deposited:15 October 2021
Date of first online publication:05 January 2021
Date first made open access:05 January 2022

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