Did you feel that? Tremors allows you to keep tabs on seismic activity from around the world, right from the comfort of your Mac. Using data compiled by the United States Geological Survey (USGS) and other sources, Tremors gives you up-to-the-minute details on the latest rumblings, and plots every quake on a map for easy reference. Whether you're a casual observer of nature's devastating phenomenon or an avid follower, Tremors is designed to satisfy your curiosity.