"Internet traffic counters used to measure web hits could rival dedicated seismological equipment as a way of detecting earthquakes."

Read more (http://technology.newscientist.com/article/mg19826626.300-web-hits-used-to-pinpoint-earthquakes.html?DCMP=ILC-hmts&nsref=env3_head_Web%20hits%20used%20to%20pinpoint% 20earthquakes)

Why didn't we think of that? :D