Regional Seismic Event Location in Asia
Example PPC Surfaces
The figures in the left column show Pwave residuals for PIDC stations. Figures in the last two columns are Pwave residual surfaces for four nearly collocated NEIC stations. The data (residuals) are defined at the location of the seismic event from which they were derived (black squares). For figures in the second column, surfaces were constructed using a Baysian kriging algorithm (Shultz, et. al., 1998) with model and data correlations of 7°; and 5° respectively. Figures in the third column have surfaces generated in GMT by fitting blockmedianfiltered residuals (block = .25°) to a surface under tension using splines (Smith and Wessel, 1990). Note the general similarity between the maps of Presiduals for the four stations in the center column. In general, PIDC stations do not have enough available data to generate reasonable correction surfaces.
PIDC Stations 
NEIC Stations 
NEIC Stations 












Introduction  Seismicity
of Asia  Station Variances  Example
PPC Surfaces
Regionalized Lop Nor Relocations 
Grid Search Locations 
Preliminary P_{n} BackProjection Results 
Conclusions