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Previous HitSeismicityNext Hit Previous HitInducedNext Hit by Hydraulic Fracturing in the Central and Eastern United States


We have investigated Previous HitseismicityNext Hit potentially associated with hydraulic fracturing (HF) in several areas of the Central and Eastern United States to improve our understanding of the phenomena. In our study we utilized multi-station template matching to lower the detection threshold and improve the completeness of Previous HitseismicityNext Hit catalogs. We also collected all publicly available information on timing and location of HF-related well stimulations to evaluate relationships with recorded Previous HitseismicityNext Hit. While rare, we find that HF induces Previous HitseismicityNext Hit with magnitudes greater than 2.0 more often than generally assumed and is the dominant source of Previous HitseismicityNext Hit in some areas. In over a dozen regions, >90% of the Previous HitseismicityNext Hit was correlated with reported HF wells, and in a few cases >30% of the HF wells were correlated with Previous HitseismicityNext Hit. Across the states of Ohio, Oklahoma, and Texas, we have identified ~600 earthquakes with M 2.0-3.8 that are best explained by being Previous HitinducedNext Hit by HF. These findings imply regulations that require operators to modify completion strategies if a M > 2.0 earthquake occurs are likely to have an impact on future operations. Detailed investigations of Previous HitseismicityNext Hit Previous HitinducedNext Hit by HF indicate that the maturity of nearby faults plays a key role in the types of Previous HitseismicityNext Hit that are produced. In addition, we find several lines of evidence that poroelastic stress changes from HF contribute to the production of observed Previous HitseismicityTop.