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Stress rates in the Central Cascadia Subduction Zone inferred from an elastic plate model
Author(s) -
Williams Charles A.,
McCaffrey Robert
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl012623
Subject(s) - geology , subduction , seismology , trench , thrust fault , tilt (camera) , fault (geology) , stress (linguistics) , geodesy , geometry , tectonics , linguistics , chemistry , philosophy , mathematics , organic chemistry , layer (electronics)
GPS vectors and surface tilt and uplift rates from northwestern Oregon and southwestern Washington are inverted to estimate rates of stress changes along the Cascadia thrust fault and base of the overriding plate using a finite thickness elastic plate model. The data are fit by elevated shear stress and Coulomb Failure Function (CFF) rates within 80 km of the trench. By contrast, an elastic half‐space dislocation model does not fit as well and predicts significant amounts of locking and elevated CFF rates near the coast.