Last night Rachel spoke with Terrence Henry, energy and environment reporter for StateImpact Texas, about the relationship between recent, unusual earthquakes in Texas and nearby fracking waste disposal wells, and shared this map from the Houston Chronicle's Fuel Fix blog:
View Earthquakes rock North Texas in a larger map
Mr. Henry, in his article on the subject, featured a more detailed map from the new University of Texas study by seismologist Cliff Frohlich. Below, the red dots are quakes. The yellow squares and also the plus signs are wells (depending on barrels of water per month). And the green stripes are fault lines. Triangles are seismograph stations.