Toward an integrative geological and geophysical view of Cascadia subduction zone earthquakes
Annual Review of Earth and Planetary Sciences
By: Maureen A. L. Walton, Lydia M. Staisch, Tina Dura, Jessie K. Pearl, Brian L. Sherrod, Joan S. Gomberg, Simon E. Engelhart, Anne Trehu, Janet Watt, Jonathan P. Perkins, Robert C. Witter, Noel Bartlow, Chris Goldfinger, Harvey Kelsey, Ann Morey, Valerie J. Sahakian, Harold Tobin, Kelin Wang, Ray Wells, and Erin A. Wirth
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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.
Suggested Citation
Walton, M.A., Staisch, L.M., Dura, T., Pearl, J.K., Sherrod, B., Gomberg, J.S., Engelhart, S.E., Trehu, A., Watt, J., Perkins, J.P., Witter, R., Bartlow, N., Goldfinger, C., Kelsey, H., Morey, A., Sahakian, V., Tobin, H., Wang, K., Wells, R., Wirth, E.A., 2021, Toward an integrative geological and geophysical view of Cascadia subduction zone earthquakes: Annual Review of Earth and Planetary Sciences, v. 49, p. 367-398, https://doi.org/10.1146/annurev-earth-071620-065605.
Study Area
| 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 |
| Volume | 49 |
| Year Published | 2021 |
| Language | English |
| Publisher | Annual Reviews |
| Contributing office(s) | Pacific Coastal and Marine Science Center |
| Description | 32 p. |
| First page | 367 |
| Last page | 398 |
| Country | Canada, United States |
| State | British Columbia, Oregon, Washington |