Far-field pressurization likely caused one of the largest injection induced earthquakes by reactivating a large preexisting basement fault structure

摘要: The Mw 5.1 Fairview, Oklahoma, earthquake on 13 February 2016 and its associated seismicity produced the largest moment release in central eastern United States since 2011 Mw 5.7 Prague, sequence is one of earthquakes potentially linked to wastewater injection. This energetic has five with Mw 4.4 or larger. Almost all these occur Precambrian basement a partially unmapped 14 km long fault. Regional injection into Arbuckle Group increased approximately sevenfold 36 months prior start (January 2015). We suggest far-field pressurization from clustered, high-rate wells greater than 12 km this induced earthquakes. As compared Fairview sequence, diffuse near wells, where pressure changes are expected be largest. points critical role that preexisting faults play occurrence large