2018 Volume 27 Pages 98-108
I have developed a method to measure relative traveltimes of teleseismic P-wave between two stations as a function of frequency. The method includes an automated correction for the dispersion effects caused by the crustal reverberations at stations. Relative traveltime is computed by cross-correlating the corrected P-wave waveform at a station with that at the other station at ten narrow frequency bands from 0.03 to 0.77 Hz.
This method was applied to the seismograms including the broadband ocean-bottom seismograph (BBOBSs) data from the TIARES and Polynesian BBOBS networks in French Polynesian region and the NOMAN network in northwest Pacific Ocean. Obtained relative travel time data have been used to improve the spatial resolution in the previous seismic velocity model using finite frequency P wave traveltime tomography.
