The Updated LLNL-G3D Global P-Wave Velocity Model and Its Performance in Seismic Event Location

The objective of this project is to generate a seamless model of the Earth s crust and mantle that is capable of accurately predicting regional and teleseismic travel times. The objective will further advance event monitoring capabilities, through self-consistent determination of seismic travel time...

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Bibliographic Details
Main Authors: Simmons, Nathan A, Myers, Stephen C, Johannesson, Gardar, Matzel, Eric M
Format: Report
Language:English
Subjects:
EARTH MANTLE
SEISMIC WAVES
Seismology
TRAVEL TIME
VELOCITY
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Summary:The objective of this project is to generate a seamless model of the Earth s crust and mantle that is capable of accurately predicting regional and teleseismic travel times. The objective will further advance event monitoring capabilities, through self-consistent determination of seismic travel times that are necessary for accurate event location. The objective requires simultaneous modeling of detailed upper mantle heterogeneities to adequately predict regional phases such as Pn and lower mantle structures to predict teleseismic travel times. In addition to determining velocity structure, an efficient model design and computational framework must be established in order to routinely utilize the outcome model. In this report, we present our latest global 3-D P-wave velocity model and event location validation results. Published in the Proceedings of the 2011 Monitoring Research Review - Ground-Based Nuclear Explosion Monitoring Technologies, 13-15 September 2011, Tucson, AZ. Volume I. Sponsored by the Air Force Research Laboratory (AFRL) and the National Nuclear Security Administration (NNSA). U.S. Government or Federal Rights License