Title |
Near-trench slip potential of megaquakes evaluated from fault properties and conditions
|
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Published in |
Scientific Reports, June 2016
|
DOI | 10.1038/srep28184 |
Pubmed ID | |
Authors |
Tetsuro Hirono, Kenichi Tsuda, Wataru Tanikawa, Jean-Paul Ampuero, Bunichiro Shibazaki, Masataka Kinoshita, James J. Mori |
Abstract |
Near-trench slip during large megathrust earthquakes (megaquakes) is an important factor in the generation of destructive tsunamis. We proposed a new approach to assessing the near-trench slip potential quantitatively by integrating laboratory-derived properties of fault materials and simulations of fault weakening and rupture propagation. Although the permeability of the sandy Nankai Trough materials are higher than that of the clayey materials from the Japan Trench, dynamic weakening by thermally pressurized fluid is greater at the Nankai Trough owing to higher friction, although initially overpressured fluid at the Nankai Trough restrains the fault weakening. Dynamic rupture simulations reproduced the large slip near the trench observed in the 2011 Tohoku-oki earthquake and predicted the possibility of a large slip of over 30 m for the impending megaquake at the Nankai Trough. Our integrative approach is applicable globally to subduction zones as a novel tool for the prediction of extreme tsunami-producing near-trench slip. |
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Geographical breakdown
Country | Count | As % |
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Japan | 5 | 26% |
Unknown | 14 | 74% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 17 | 89% |
Scientists | 2 | 11% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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Unknown | 52 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 15 | 29% |
Researcher | 9 | 17% |
Professor | 8 | 15% |
Student > Bachelor | 5 | 10% |
Student > Master | 4 | 8% |
Other | 5 | 10% |
Unknown | 6 | 12% |
Readers by discipline | Count | As % |
---|---|---|
Earth and Planetary Sciences | 36 | 69% |
Nursing and Health Professions | 2 | 4% |
Physics and Astronomy | 1 | 2% |
Unspecified | 1 | 2% |
Social Sciences | 1 | 2% |
Other | 1 | 2% |
Unknown | 10 | 19% |