Plate tectonic theory of earthquake prediction postulates the division of the outermost sixty miles of the earth crust and mantle into several large rigid blocks which cover the arcs plates spread apart at ocean ridges where new material rises to the surface and converges at the island . arcs, and arclike structures where the lithosphere descends. Sudden slippage along the edges of the plates result in large Earthquake predictions carried out by Seismic gaps, tends to show that the continuity of the movement along the plate boundaries, indicates the areas which are not subjected to earthquakes for tens to hundreds of years are the likely sites for earthquakes, such sites are known as seismicity gaps. Premonitory changes in the ratio of seismic compressional wave velocity to seismic shear wave velocity for a series of small to moderate size earthquakes in certain regions of New York have been worked out. Working model based on a phenomenon known as dilatancy in which rock increases in volume before the earthquake. Astronomical Radio interferometeric earth surveying are the quasars distant from the earth. Two antennas located miles apart are turned to the same quasar. One antenna because of its separation will pick up the signal ahead of other. The time difference is fantastically small and can be measured by atomic clocks and computers. This approach is a promising one for earthquake prediction with the burst of high frequency radio energy.