Poster #181, Seismology
Initial Tests of a Bayesian Framework for Directivity and Source Spectral Analysis: Application to the July 2019 Ridgecrest Earthquake Sequence
Poster Image:
Poster Presentation
2021 SCEC Annual Meeting, Poster #181, SCEC Contribution #11109 VIEW PDF
encoding of prior physical knowledge to guide inversions while solving for the full posterior probability distribution that fully quantifies parameter tradeoffs and uncertainties. In these inversions, input data include spectral ratios between a target event and one or more nearby empirical Green’s function (EGF) events, and the Bayesian inversion solves for corner frequencies and spectral falloff rates for all events, as well as a directivity metrics for the target event. Initial application of this computationally intensive technique to large (M5 and greater events) during the July 2019 Ridgecrest earthquake sequence appears promising, with physically viable priors enabling stable corner frequency estimates for EGFs and target events alike. We anticipate that the work performed here will form the basis of a future, larger study applying the method at scale across California and beyond, likely with the help of high-performance computing resources.
SHOW MORE
SHOW MORE