Estimation of fault propagation distance from fold shape: Implications for earthquake hazard assessment
- 1Department of Geological Sciences, Cornell University, Ithaca, New York 14853, USA
- 2Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
Abstract
A numerical grid search using the trishear kinematic model can be used to extract both slip and the distance that a fault tip line has propagated during growth of a fault-propagation fold. The propagation distance defines the initial position of the tip line at the onset of slip. In the Santa Fe Springs anticline of the Los Angeles basin, we show that the tip line of the underlying Puente Hills thrust fault initiated at the same position as the 1987 magnitude 6.0 Whittier Narrows earthquake.
Footnotes
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- Accepted September 12, 2000.
- Received May 12, 2000.
- Revision received August 28, 2000.
- Geological Society of America
