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Three-dimensional simulations of ground motions in sedimentary basins

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Abstract

This report describes work being done at the U.S. Geological Survey on 3-D simulations of earthquake ground motions in sedimentary basins. The ultimate goal of this research is to predict strong ground motions in sedimentary basins for expected large earthquakes. This report emphasizes the inadequacy of using flat-layered models for synthesizing ground motions in sedimentary basins. 2-D and 3-D simulations have demonstrated how the slope of the alluvium-bedrock interface can trap S-waves in the basins, producing prolonged surface wave trains. These large surface waves are not generated in 1-D flat layered models, which underestimate the duration and peak amplitude of shaking. We present results of 3-D simulations for the San Bernardino and Santa Clara valleys, California, for earthquakes on the San Andreas fault.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Three-dimensional simulations of ground motions in sedimentary basins
ISBN:
0872629104
Year Published:
1993
Language:
English
Publisher:
Publ by ASCE
Publisher location:
New York, NY, United States
Larger Work Title:
Structural Engineering in Natural Hazards Mitigation
First page:
253
Last page:
258
Conference Title:
Proceedings of the Symposium on Structural Engineering in Natural Hazards Mitigation
Conference Location:
Irvine, CA, USA
Conference Date:
19 April 1993 through 21 April 1993