Goodness-of-fit Criteria for Broadband Synthetic Seismograms, With Application to the 2008 Mw5.4 Chino Hills, CA, Earthquake

Kim B. Olsen, & John E. Mayhew

Published 2010, SCEC Contribution #1430

In this study we present a new goodness-of-fit (GOF) method for the validation of BBs, consisting of a combination of different systematic tests involving commonly-used metrics characterizing the fit such as peak ground motions, Fourier and response spectra, cross correlation, and duration measures. In addition, for structural engineering-specific applications, the GOF algorithm includes a comparison of the IE ratios for the seismograms. A detailed description of the estimation of the metrics and comments on their relevance for the GOF estimate is provided in the electronic supplement. We test the method for BBs (0-10Hz) generated for the 2008 Mw5.4 Chino Hills, CA, earthquake.

Two additional GOF measures (Anderson, 2004; Kristekova et al., 2006) have been proposed for the purpose of validation and verification of synthetic seismograms. These two methods relate to and differ from our proposed GOF measure in important ways. As guidance for the user to select the method optimal for their application, we discuss and compare these methods with the GOF measure proposed in the electronic supplement.

Citation
Olsen, K. B., & Mayhew, J. E. (2010). Goodness-of-fit Criteria for Broadband Synthetic Seismograms, With Application to the 2008 Mw5.4 Chino Hills, CA, Earthquake. Seismological Research Letters, 81, 715-723.