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
中科院分区:
文献类型:
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作者:
W. Bakun;M. Stickney;G. Rogers
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.