Report on the LLNL Global Full-waveform Inversion Workflow and Progress

Technical Report · Fri Aug 20 04:00:00 EDT 2021

DOI:https://doi.org/10.2172/1813693· OSTI ID:1813693

Simmons, Nathan A. ^[1]; Morency, Christina ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

LLNL has developed the SPiRaL global seismic tomography model based upon millions of body wave travel times and surface wave dispersion curves in the period range of 25-200 seconds (Simmons et al., 2021). The motivation to construct the SPiRaL model (which stands for S-, P-, Rayleigh, and Love waves) is based upon the guidance provided by a 3-D model workshop held in Berkeley in 2007 and documented in a paper by Zucca et al. (2009). It was concluded in Zucca et al. (2009) that a “practical and obtainable” model is one that predicts body wave travel times for event location while also predicting surface wave velocities for moment tensor estimation. We have largely followed that guidance which has led to the construction of SPiRaL. Looking forward, we now seek to improve the global model through full waveform inversion (FWI). This necessitates the development/customization of an efficient and flexible modeling workflow to automate the process using LLNL’s supercomputing platforms. This report briefly outlines the work that being performed at LLNL to develop the necessary tools and framework to update the SPiRaL global model with full waveform information.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-07NA27344
• OSTI ID: 1813693
• Report Number(s): LLNL-TR-825807; 1040089
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES