24-10-2012, 03:59 PM
Waveform Modeling of the Crust and Upper Mantle Using S, Sp, SsPmP, and Shear-Coupled PLWaves for Improved Event Location, Focal Depth Determination, and Uncertainty Estimation
ABSTRACT
During this contract’s performance period, we intend to complete the development of a method for determining crust and
upper mantle structure in seismic regions and evaluate its capacity to produce sufficiently accurate models for locating
hypocenter of small-to moderate seismic events. Specifically, we will: 1) complete development of a waveform modeling
approach to determine the structure of the crust and upper mantle in a broad region surrounding a broadband seismographic
station; 2) validate the method through careful comparison between models produced with our method and models produced
by higher resolution active-source experiments, as well as models produced by surface wave inversion and receiver function
methods; 3) apply and validate methods for computing uncertainty statistics from the products of global optimization searches;
4) refine, apply, and evaluate waveform correlation methods to ground-truth data from regional events and explosions with
well-constrained focal depths, using crust/upper mantle models produced with our method; 5) apply the modeling method to
teleseismic data recorded at stations in China, Africa, and the Middle East; 6) apply and evaluate waveform correlation
methods to determine focal depths for small- and moderate- magnitude regional events recorded at stations in China, Africa,
and the Middle East using crust/ upper mantle models determined in this study.
ABSTRACT
During this contract’s performance period, we intend to complete the development of a method for determining crust and
upper mantle structure in seismic regions and evaluate its capacity to produce sufficiently accurate models for locating
hypocenter of small-to moderate seismic events. Specifically, we will: 1) complete development of a waveform modeling
approach to determine the structure of the crust and upper mantle in a broad region surrounding a broadband seismographic
station; 2) validate the method through careful comparison between models produced with our method and models produced
by higher resolution active-source experiments, as well as models produced by surface wave inversion and receiver function
methods; 3) apply and validate methods for computing uncertainty statistics from the products of global optimization searches;
4) refine, apply, and evaluate waveform correlation methods to ground-truth data from regional events and explosions with
well-constrained focal depths, using crust/upper mantle models produced with our method; 5) apply the modeling method to
teleseismic data recorded at stations in China, Africa, and the Middle East; 6) apply and evaluate waveform correlation
methods to determine focal depths for small- and moderate- magnitude regional events recorded at stations in China, Africa,
and the Middle East using crust/ upper mantle models determined in this study.