In 1935, Nikola Tesla revealed that an earthquake in the region of his New York laboratory in 1898, was the result of a machine he had been experimenting with. This invention, the Tesla Oscillator, creates a cumulative resonance effect. This is why soldiers break step when crossing a bridge. Otherwise they could cause the bridge to self destruct.This book presents this technology based on sonic vibrations. Now, for the first time, the secrets of the Tesla Oscillator are available to both the layman and advanced researcher.