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Poroelastic coupling between the 1992 Landers and Big Bear Earthquakes
Author(s) -
Masterlark T.,
Wang H.
Publication year - 2000
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 - 10.1029/2000gl011472
Subject(s) - poromechanics , geology , seismology , slip (aerodynamics) , isotropy , san andreas fault , homogeneous , induced seismicity , shear (geology) , shear stress , fault (geology) , geotechnical engineering , petrology , mechanics , physics , statistical physics , porous medium , quantum mechanics , porosity , thermodynamics
A three‐dimensional finite element model was constructed to investigate the significance of poroelastic coupling between the 1992 Landers and Big Bear earthquakes in southern California. The homogeneous poroelastic model predicted a maximum increase in left lateral slip potential (change in shear stress less the change in effective fault normal stress scaled by a coefficient of friction) along the southwest part of the Big Bear fault, consistent with the epicentral location. In contrast, slip potential calculated for a weak fault zone in a state of isotropic stress for drained conditions, indicated a maximum increase along the northeast part of the Big Bear fault.
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