If you have some idle time in your hands and you want to channel that to something productive and educational, then maybe this free Mac app is the answer. The SeisMac is a Mac OS X Cocoa application that turns your MacBook or MacBook Pro into a seismograph. It takes advantage of your laptop's Sudden Motion Sensor in order to come up with real-time, 3-axis acceleration graphs. Maybe with this one, you won't have to rely to FEMA that much anymore.

Anyways, to really test this app, you can place your laptop on a table and see the seismic waves from tapping your toe on the floor. You may also lay your laptop on your chest and see your heartbeat. And of course, if there is a real earthquake, SeisMac will be displaying full seismic information while you drop, cover and hold-on.

You need to have a  Mac OS X 10.4 or later for this one to run.

Download: [SeisMac]