Mathematics – Logic
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..611a&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 7, p. 611-614.
Mathematics
Logic
7
Geological Faults, Plates (Tectonics), Subduction (Geology), Velocity Measurement, Constraints, Earthquakes, Elastic Deformation, Geodetic Satellites, Japan, Mathematical Models
Scientific paper
Space geodetic data from very long baseline interferometry (VLBI) was used to estimate velocity relative to the plate interiors of two sites on the deforming leading edge at the Japan trench. Elastic models of interseismic deformation and results obtained were used to put constraints on the slip rate along the main thrust of the Japan subduction zone. Observed velocities reflect the sum of permanent west-northwest shortening in Honshu, elastic deformation due to locking of the main thrust fault at the Japan trench, and deformation associated with the subducting Phillipine plate. These velocities limit the locked segment of the main thrust at the Japan trench to 27 km vertically and 100 km along the dip. This indicates that the main Pacific plate thrust fault is not strongly coupled and probably does not generate strong earthquakes.
Argus Donald F.
Lyzenga Gregory A.
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