Huffington Post: From 1975 to 2008, central Oklahoma experienced an average of one to three magnitude 3.0 earthquakes or larger. Since 2008, that average has increased to around 40 per year, according to data collected by the U.S. Geological Survey. The USGS has termed the swell an "earthquake swarm," and on Tuesday, it ruled out the possibility this sharp increase is a naturally occurring phenomenon. "We've statistically analyzed the recent earthquake rate changes and found that they do not seem to be due to typical,...