Lay and Helmberger and their co-workers have recently proposed models of Earth structure in which the S-velocity increases discontinuously with depth by about...
A significant drop in seismic travel times of up to 1.0% occurred in the Charlevoix region between 1979 and 1980, possibly related to the M = 5.0 (Aug., 1979)...
Data from the recently upgraded short-period Yellowknife array (NWT, Canada) were searched over the period from November 1989 to July 1990 for the distance...