Implementing Inter-Period Correlations into SCEC BBP Simulations

Jeff R. Bayless, & Norman A. Abrahamson

Published August 9, 2018, SCEC Contribution #8362, 2018 SCEC Annual Meeting Poster #011

Methods for implementing the inter-period correlation of epsilon into two SCEC BBP simulation methods are explored. For Exsim (Atkinson and Assatourians, 2015), the correlated epsilons are introduced in the frequency domain and the Goulet et al. (2015) set of validation simulations are repeated. We compare the Exsim results in the form of waveforms, response spectral goodness of fit and variability, and correlation between frequencies. For GP (Graves and Pitarka, 2015), we evaluate the long-period correlations of the method in it's current form, and test the sensitivity of the correlations to various source methods: GP unmodified, SONG (Song, 2015) which uses GP wave propagation but a modified source representation, with simulations from Arben Pitarka, which use an asperity-based source along with GP wave propagation. Based on these results, we conclude that modifications to the source can have impactful effects on the between-event and within-event components of the correlation.

Key Words
Broadband Platform, simulations, correlation, validation

Bayless, J. R., & Abrahamson, N. A. (2018, 08). Implementing Inter-Period Correlations into SCEC BBP Simulations. Poster Presentation at 2018 SCEC Annual Meeting.

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