Journal
SCIENCE
Volume 304, Issue 5675, Pages 1295-1298Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1096535
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Silent-slip events have been detected at several subduction zones, but the cause of these events is unknown. Using seismic imaging, we detected a cause of the Tokai silent slip, which occurred at a presumed fault zone of a great earthquake. The seismic image that we obtained shows a zone of high pore fluid pressure in the subducted oceanic crust located down-dip of a subducted ridge. We propose that these structures effectively extend a region of conditionally stable slips and consequently generate the silent slip.
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