Seismic anisotropy is the variation of seismic wavespeed with direction. Seismic tomographic models improve with advancements in computing and expansion of seismic networks. They focus on seismic and tectonic activity by using a seismograph. The focal depth can be calculated from measurements based on seismic wave phenomena. Their regulations include restrictions on mining and seismic acoustic surveys. Propagation velocity of the seismic waves through solid rock ranges from approx. Geologically, these islands were formed by volcanic and seismic events. Optical fibers are used as hydrophones for seismic and sonar applications. Using seismic and geodetic data, Luzon was modeled by Galgana et al. In geology, it is important in the study of seismic waves. These include thermal, seismic, and elevation anomalies. There was no evidence of ground vibration, seismic or otherwise. There are two types of seismic "ocean waves". SAW relies on the propagation of a wave front, which appears similar to seismic activities. That could be an explanation for the anisotropy detected in seismic studies.