俄克拉荷马卡卢梅特清晨连发两起小地震，全州一周近40起
美国地质调查局记录显示，卡卢梅特11月5日清晨4时30分至5时30分接连发生两起地震，震级均低于3级，震源深度约6公里、约4英里，未造成损失。前一天该州多地也有震感：11月4日凌晨1时左右，伊尼德附近发生3.57级地震；塔尔萨附近居民11月4日下午2时至4时也两次感到地面晃动，但地质调查局确认那是奥瓦索附近两起采石爆破所致，震级约1.5级，发生在地表。地质调查局数据显示，自10月29日至11月5日上午，全州已记录近40起可报告地震，其中部分为采石爆破。俄克拉荷马州地震频发，多数与油气生产废水回注有关，即把油气生产过程中产生的废水注入地下深处，而非水力压裂本身。地质调查局指出，自1990年以来，水力压裂仅引发过少数地震，该州已知由水力压裂诱发的最大地震为2019年的一起3.6级地震。
（来源：美国地质调查局）
Two Small Quakes Recorded Near Calumet, Oklahoma in One Morning; Nearly 40 Statewide in a Week
U.S. Geological Survey records show two earthquakes struck near Calumet between 4:30 and 5:30 a.m. on November 5, both below magnitude 3, at a depth of about six kilometers (roughly four miles), with no damage reported. Shaking was felt in several parts of the state the day before as well: at about 1 a.m. on November 4, a magnitude 3.57 quake struck near Enid, and Tulsa-area residents twice felt the ground move between 2 and 4 p.m. on November 4, though the USGS determined those were two quarry blasts near Owasso, measuring about magnitude 1.5 at the surface. USGS data show that from October 29 to the morning of November 5, nearly 40 reportable seismic events were recorded statewide, some of them quarry blasts. Earthquakes are frequent in Oklahoma, most of them related to the underground disposal of wastewater from oil and gas production, rather than hydraulic fracturing itself. The USGS notes that since 1990, hydraulic fracturing has induced only a few earthquakes, and the largest known fracking-induced quake in the state was a magnitude 3.6 event in 2019.
(Source: U.S. Geological Survey)
来源：美国地质调查局
发布：GSM·美国（发布链接）
图片来源：俄克拉何马城俄克拉荷马州议会大厦（图：Wikimedia Commons，CC BY-SA 2.0） / The Oklahoma State Capitol in Oklahoma City (Wikimedia Commons, CC BY-SA 2.0)
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