jim fink's velocity profit multiplier reviews

The within- plate dispersion of seismic anisotropy for oceanic lithosphere (Ïƒ=19.2Â° ) differs insignificantly from that for continental lithosphere (Ïƒ=21.6Â° ). The net rotation of the lithosphere is 0.25Â☐.11Â° Ma-1 (95% confidence limits) right-handed about 57.1Â°S, 68.6Â☎.

SKS-MORVEL indicates that eight plates (Amur, Antarctica, Caribbean, Eurasia, Lwandle, Somalia, Sundaland, and Yangtze) have angular velocities that differ insignificantly from zero. The SKS-MORVEL absolute plate angular velocities (based on the Kreemer data set) are determined from the poles from eight plates weighted proportionally to the root-mean-square velocity of each plate. Second, solve for the best fit to these poles while constraining relative plate angular velocities to consistency with the MORVEL relative plate angular velocities. To account for these correlations, we adopt a two-tier analysis: First, find the pole of rotation and confidence limits for each plate individually. We demonstrate that the errors in plate motion azimuths inferred from shear-wave splitting beneath any one tectonic plate are correlated with the errors of other azimuths from the same plate.

We also explore the effect of using geologically current plate velocities (i.e., the MORVEL set of angular velocities ) compared with geodetically current plate velocities (i.e., the GSRM v1.2 angular velocities ). Here we analyze two global sets of shear-wave splitting data, that of Kreemer and an updated and expanded data set, to estimate plate motions and to better understand the dispersion of the data, correlations in the errors, and their relation to plate speed. The orientation of seismic anisotropy inferred beneath plate interiors may provide a means to estimate the motions of the plate relative to the sub-asthenospheric mantle.

Jim fink's velocity profit multiplier reviews