A pair of small earthquakes struck north-central Oklahoma about an hour apart early Thursday morning, according to the U.S. Geological Survey (USGS).
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Scientist: Drilling Caused Small South Texas Quakes
A geophysicist with the U.S. Geological Survey (USGS) believes at least two minor earthquakes in South Texas, including a 3.0-magnitude temblor on Feb. 4, were caused by oil and natural gas drilling.
February 14, 2012