Document Type
Article
Publication Date
3-26-2018
Publication Title
Geophysical Research Letters
Abstract
Theoretical modeling and investigations of recent subduction zone earthquakes show that geodetic estimates of interseismic coupling and the spatial distribution of coseismic rupture are correlated. However, the utility of contemporary coupling in guiding construction of rupture scenarios has not been evaluated on the world’s most hazardous faults. Here we demonstrate methods for scaling coupling to slip to create rupture models for southwestern Japan’s Nankai Trough. Results show that coupling-based models produce distributions of ground surface deformation and tsunami inundation that are similar to historical and geologic records of the largest known Nankai earthquake in CE 1707 and to an independent, quasi-dynamic rupture model. Notably, these models and records all support focused subsidence around western Shikoku that makes the region particularly vulnerable to flooding. Results imply that contemporary coupling mirrors the slip distribution of a full-margin, 1707-type rupture, and Global Positioning System measurements of surface motion are connected with the trough’s physical characteristics.
Volume
45
First Page
2986
Last Page
2994
DOI
10.1002/2018GL077329
Rights
©2018. American Geophysical Union. All Rights Reserved.
Recommended Citation
Baranes, Hannah; Woodruff, Jon D.; Loveless, John P.; and Hyodo, M., "Interseismic Coupling-Based Earthquake and Tsunami Scenarios for the Nankai Trough" (2018). Geosciences: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/geo_facpubs/26
Comments
Archived as published.