SURFACE WAVE TOMOGRAPHY FROM AMBIENT SEISMIC NOISE AND TELESEISMIC EVENTS ACROSS WESTERN US
|Center for Imaging the Earth's Interior
Department of Physics, University of Colorado at Boulder
(a)¨C(d) Shear wave speed maps at depths of 5, 15, 50 and 100 km. (e)¨C(g) Vertical cross
sections of shear wave speed along three profiles delineated by the white lines in Figure 5d. Black
contours outline the ¡®¡®persistent¡¯¡¯ upper mantle velocity anomalies. Topography is overplotted above
individual cross sections with major tectonic units labeled using abbreviations defined in Figure 1
caption. The black triangles in Figures 5c¨C5f represent active volcanoes in the Cascade Range. Shear
velocity anomalies are computed relative to the average 1-D model across the region plotted in Figure 5h.
(h) The average 1-D model across the study region. (i) The standard deviation (STD) of the ensemble of
acceptable models (i.e., average uncertainty, dashed line) and the root mean square (RMS) of the velocity
perturbations (solid line) taken across the entire region are shown.
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CIEI Research, Ambient Noise Surface Wave Tomography
|This project is funded by the National Science Foundation - EAR 0450082.
All data was obtained from the IRIS Data Management Center.