A machine for detecting earthquake precursory signals that comprises a spring-loaded balance wheel that is in reality an oscillating seismometer, the oscillating seismometer employed as a local oscillator in a seismic wave receiver. A clock and balance wheel make up the seismic wave receiver which detects the precursory micro-seismic vibrations that precede the earthquake. Extreme sensitivity is accomplished by the immense storage capacity of the clock, for each individual swing of the balance wheel, a miniscule interruption takes place that will go unnoticed but after tens of thousands of swings, which would take place over night for example, a buildup of these interruptions will eventually have their effect.