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首页> 外文期刊>Seismological research letters >The 2006-2007 earthquake sequence at Bar Harbor, Maine
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The 2006-2007 earthquake sequence at Bar Harbor, Maine

机译:2006-2007年缅因州巴港的地震序列

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摘要

One purpose of monitoring earthquake activity in northeasternNorth America is to discover which geologic structures are seis-mically active in this region. If seismically active structures canbe found, they can be studied to decipher their seismic historyand their potential for strong earthquakes. No seismically activegeologic structures have yet been confirmed in the northeast-ern United States (Ebel and Kafka 1991). The only earthquakewith observed surface faulting in northeastern North Americatook place in the Ungava Peninsula of northern Quebec in1989 (Adams et al. 1991). Other than some minor offsets ofglacial striations (Oliver et al. 1970), no geologic evidence ofHolocene surface faulting in the northeastern United States hasbeen reported in the literature. Furthermore, the seismicity thathas been detected by modern regional seismic networks in thenortheastern United States does not align convincingly alongknown or suspected geologic structures. Nevertheless, the per-sistence of small-earthquake activity over time and the historicoccurrences of past damaging earthquakes (e.g., Ebel 1996; Ebel2000; Ebel et al. 2000; Ebel 2006) indicate that there must besome seismically active structures in the region that are capa-ble of hosting earthquakes above magnitude 6.0. Because suchearthquakes are capable of causing significant damage, there isgreat incentive to learn which structures are seismically active inthis heavily populated region.
机译:监视北美东北部地震活动的一个目的是发现该地区哪些地震构造活跃。如果可以找到具有地震作用的结构,则可以对其进行研究以破译其地震历史以及发生强震的可能性。在美国东北部,尚未确认任何地震活动的地质构造(Ebel and Kafka 1991)。 1989年在北美洲东北部发生的唯一地震,是魁北克北部翁加瓦半岛的一个地方(Adams等,1991)。除了一些小的冰川条纹偏移(Oliver et al。1970),文献还没有报道美国东北部全新世地表断层的地质证据。此外,在美国东北部由现代区域地震网络检测到的地震活动并不能令人信服地沿着已知或可疑的地质结构排列。然而,随着时间的流逝,小地震活动的持续存在和过去破坏性地震的历史发生(例如,Ebel 1996; Ebel2000; Ebel等人2000; Ebel 2006)表明,该地区一定存在一些地震活动结构。能够承受6.0级以上的地震。由于此类地震能够造成重大破坏,因此有很大的动机去了解在这个人口稠密地区哪些结构具有地震活动性。

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