Abstract: The present invention is an earthquake detector and alarm system designed to detect even very low seismic vibration activity and warn the user. The present invention's detector sensor is selective to certain frequencies that are most probable in seismic activity and resistant to frequencies not typical in seismic activity, thus providing a high level of seismic activity detection and a low level of false triggers from non-seismic sources. It's purpose is to notify dwelling occupants that an earthquake is underway thus removing doubt that emergency action should be immediately taken. The clear, unmistakable warning provided by the present invention is valuable for sleeping occupants who might otherwise sleep through the initial activity in a seismic event, loosing valuable time to take emergency actions.