The 16 May 1909 Northern Great Plains Earthquake

The 16 May 1909 Northern Great Plains Earthquake
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1909 年 5 月 16 日北部大平原地震

DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
G. Rogers
G. Rogers
中科院分区:
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文献类型:
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作者:
W. Bakun;M. Stickney;G. Rogers

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美国大平原北部历史上最大的地震发生在1909年5月16日。我们对烈度分配的分析认为,地震地点(北纬48.81°,西经105.38°)靠近蒙大拿州-萨斯喀彻温省边界,烈度震级MI为5.3-5.4级。欧洲两个地震观测站的观测结果显示,S的平均M值为5.3。1909年的地震靠近蒙大拿州和萨斯喀彻温省的小地震震中,并与蒙大拿州绘制的欣斯代尔断层走向。因此,1909年的地震可能发生在一条300公里长的地震活动断层上,这可能对该地区产生地震危险,特别是对20世纪30年代在蒙大拿州东北部密苏里河上建造的水力埋设的派克堡水坝。
Abstract The largest historical earthquake in the northern Great Plains occurred on 16 May 1909. Our analysis of intensity assignments places the earthquake location (48.81° N, 105.38° W) close to the Montana–Saskatchewan border with an intensity magnitude M I of 5.3–5.4. Observations from two seismic observatories in Europe give an average M s value of 5.3. The 1909 earthquake is near an alignment of epicenters of small earthquakes in Montana and Saskatchewan and on strike with the mapped Hinsdale fault in Montana. Thus, the 1909 earthquake may have occurred on a 300-km-long seismically active fault, which could have seismic-hazard implications for the region, particularly for the hydraulically emplaced earth-filled Fort Peck Dam, constructed in the 1930s on the Missouri River in northeast Montana.