Tsumami earthquake generation by the release of gravitational potential energy

McKenzie, Dan and Jackson, James (2012) Tsumami earthquake generation by the release of gravitational potential energy. Earth and Planetary Science Letters, 345–34. pp. 1-8. ISSN 0012-821X DOI https://doi.org/10.1016/j.epsl.2012.06.036

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Earthquakes that generate large tsunamis share a number of unusual features. They commonly have long source-time functions, involve large displacements, of 10 m or more, of the prisms of poorly consolidated sediment that form the accretionary wedge, and have many aftershocks with normal faulting mechanisms on the landward side of the trench. These features are not easily understood if the only source of the energy involved is the stored elastic strain. The observations, especially those from the Tohoku, Japan, 2011 earthquake, instead suggest that the observed behaviour results from the release of gravitational potential energy, as well as elastic strain. A simple model of this process can account for these and other observations.

Item Type: Article
Uncontrolled Keywords: 2012AREP; IA64;
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title: Earth and Planetary Science Letters
Volume: 345–34
Page Range: pp. 1-8
Identification Number: https://doi.org/10.1016/j.epsl.2012.06.036
Depositing User: Sarah Humbert
Date Deposited: 07 Aug 2012 11:05
Last Modified: 23 Jul 2013 10:04
URI: http://eprints.esc.cam.ac.uk/id/eprint/2578

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