Poroelastic Coupling Between the 1992 Landers and Big Bear Earthquakes

Details Poroelastic Coupling Between the 1992 Landers and Big Bear Earthquakes Poroelastic Coupling Between the 1992 Landers and Big Bear Earthquakes

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3647m&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 22, p. 3647-3650

Physics

Geophysics

4

Mathematical Geophysics: Modeling, Oceanography: General: Descriptive And Regional Oceanography, Structural Geology: Mechanics, Structural Geology: Role Of Fluids

Scientific paper

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 south-west 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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