I do think they could use the sensors to detect earth quakes as an early warning system. If they are sensitive enough to detect ground surface wave propagation, they certainly are equipped to detect sub-surface earth wave energy emissions. If they can be used in this manner described, it could certainly save thousands of lives. Tell me what you think: Merrily McCarthy 916 South Chance Avenue, Fresno, Calif. 93702; #1-702-300-6842 Correct E- mail adress: merrmcc02@attbi.com