Analysis and Simulation of Far-Field Seismic Data from the Source Physics Experiment
Abstract
The SPE-N is a series of chemical explosions intended to enhance our physical understanding and ability to quantitatively model seismic signals from explosions at the NNSS with the goal of improving our nuclear test monitoring capabilities (Brunish et al., 2010). The main objective is to develop comprehensive three-dimensional high fidelity modeling capabilities to enable a transition from the current empirically-based explosion monitoring approach, where accuracy hinges on the availability of calibration data, to a physics-based predictive approach, where seismic observables are correlated to both non-linear physical processes in the near source region, and wave propagation scattering away from the source. To address these issues, we are developing an end-to-end three-dimensional (3D) simulation methodology to model the data collected, including non-linear (shock) motions and linear anelastic motions in the solid earth. We seek to understand the partitioning of energy excited by underground explosions and its propagation in complex 3D geological structure to far-field seismic monitoring stations. The data obtained during the SPE series will be used to validate and calibrate these numerical modeling techniques. Although the entire wavefield will be modeled, particular focus is on the generation of shear waves.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2012
- Accession Number
- ADA569948
Entities
People
- Anders Petersson
- Arben Pitarka
- Arthur J. Rodgers
- Jeffery L. Wagoner
- Michael Pasyanos
- Oleg Y. Vorobiev
- Phillip E. Harben
- Robert J. Mellors
- Sean R. Ford
- William R. Walter
Organizations
- Lawrence Livermore National Laboratory