Poroelastic coupling between the 1992 landers and big bear Earthquakes

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Abstract

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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Masterlark, T., & Wang, H. (2000). Poroelastic coupling between the 1992 landers and big bear Earthquakes. Geophysical Research Letters, 27(22), 3647–3650. https://doi.org/10.1029/2000GL011472

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