The derived 3D S-velocity model will be converted to a 3D P-velocity model, using both published data on elastic properties (and their partial derivatives with temperature and pressure) of mantle rocks and empirical information provided by measured arrival times of teleseismic P and Pms waves. The corresponding P-wave model will provide an improved ability to locate seismic events.
The prediction and calibration of regional traveltimes and waveforms depend strongly on the methodology used to compute synthetic traveltimes and waveforms from a 3D velocity model. Our goal is to test the obtained S- and P-wave models' ability to predict regional P and S traveltimes, deflect wave paths and deform waveforms using different approximations (e.g. path average vs. exact numerical approaches). We will assess the effects of 3D heterogeneities first on the studied seismograms (traveltimes and waveforms) and subsequently on the 3D models derived from these data.
Berkeley Seismological Laboratory
215 McCone Hall, UC Berkeley, Berkeley, CA 94720-4760
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