| Abstract: | Phase and group velocity dispersions of fundamental mode Rayleigh waves for the path Port Moresby-Rabaul have been computed. The structural interpretation of dispersion curves for the Solomon Sea reveals the channel shear velocity as about 4.35 km/s and the channel starts around 95 km below the earth's surface. In other words, the elastic velocities-depth structure beneath the Solomon Sea is very similar to that beneath the northern part of the Western Mediterranean Basin. Further, group velocity dispersion of fundamental mode Rayleigh waves at the PMG and the RAB seismic stations have been computed. The structural interpretation of a dispersion curve for the orogenic belt of Papua New Guinea reveals a crust of about 62.5 km thick and uppermost mantle shear velocity of about 4.3 km/s. |
