<http://schema.org/alternativeHeadline>
"The injected ground fluids increase pressure on a fault's surface, unclamping the fault and making it easier to slip to cause a quake."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/how-earthquakes-in-japan-trigger-quakes-at-us-fracking>