9 Rockin’ Facts About Earthquakes

(via Mental Floss)  According to the U.S. Geological Survey (USGS), roughly 500,000 detectable earthquakes occur each year—meaning at least a few will have hit by the time you’ve finished reading this article. Of that gigantic number, however, only about 100,000 are intense enough for humans to feel the effects, and just 100 or so of those actually cause any destruction. In other words, the Earth quakes a lot, whether we realize it or not. Here are nine facts about earthquakes.