Regional Phase Amplitude Tomography for Seismic Verification
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Results
We chose grid spacing and regularization parameters based on residual variance for many runs. 
Relative attenuation correlates with geological province.
Most relative site terms are similar, but some tradeoff with attenuation may occur. A relative spreading of 0.54±0.11 is consistent with expected values.
Interpolated residuals show evidence of unmodeled Lg blockages.
Residuals also vary with distance and may indicate transition between direct and coda phases, focusing or windowing effects.
Results compare favorably with crustal coda Q.
Cover | Introduction | Data | Tomography Method | Results | Summary