A study by scientists with the U.S. Geological Survey points to oil drilling operations as the likely culprit in some of the biggest earthquakes that hit Southern California in the early 20th century — which led to questions about whether or not the Los Angeles region is really as earthquake prone as it is known for.
A number of recent studies have found that earthquakes in Oklahoma and Texas were likely induced by oil production or underground injection of oilfield wastewater. For instance, USGS researchers found that wastewater disposal most likely induced the third-largest earthquake in recent Oklahoma history, the 5.1-magnitude quake that occurred on February 13 of this year.
Previous research has found no evidence that oil operations have led to induced seismic events in Southern California, particularly the greater Los Angeles region, where many of the state’s major oilfields lie, since 1935. But what about before that?
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