Earthquake WarningMay 5th, 2014 at 10:14 pm by Bill Steffen under Bill's Blog, News, Weather
The graph (from USGS) shows earthquakes of magnitude 3.0 and greater in Oklahoma since 1978. Click on the image to enlarge. As you can see, the number of earthquakes in Oklahoma 3.0 or greater was relatively small (less than 2 a year) until 2009. We’re not halfway thru 2014 and you can see we’re already had nearly 150 quakes. Since 2009, Oklahoma has had 20 magnitude 4.0 to 4.8 quakes, plus the largest earthquake in Oklahoma’s history – a magnitude 5.6 earthquake that occurred near the town of Prague on Nov. 5, 2011. Here’s a map of earthquakes in Oklahoma – most north and east of Oklahoma City. A likely contributing factor to the increase in earthquakes is wastewater injected into deep geologic formations. You can learn more here.