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Wastewater injection depth important trigger for induced quakes

A new study aiming to provide a better understanding of how injection wells in the U.S. influence earthquake activity cites wastewater injection depth, not purely rate or volume, as a critical factor. The results suggest that efforts to restrict injection depths to certain distances above the so-called crystalline basement layer could reduce earthquake hazard. Earthquakes can be induced by industrial processes, a fact established decades ago.
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