Journal
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
Volume 107, Issue 6, Pages 2836-2845Publisher
SEISMOLOGICAL SOC AMER
DOI: 10.1785/0120170053
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Funding
- Southern California Earthquake Center (SCEC) [7365]
- National Science Foundation (NSF) [EAR-1033462]
- U.S. Geological Survey (USGS) [G12AC20038]
- NSF [EAR-1520867]
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The virtual earthquake approach to ground-motion prediction uses Green's functions (GFs) determined from the ambient seismic field to predict long-period shaking from scenario earthquakes. The method requires accurate relative GF amplitudes between stations and among components; however, the amplitudes of ambient-field GFs are known to be subject to biases from uneven source distribution. We show that multicomponent, higher order cross correlations are significantly less biased than the conventional first-order cross correlation, and we demonstrate that they provide a more reliable prediction of observed ground-motion amplitudes for a recent moderate earthquake on the San Jacinto fault in southern California.
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