Earthquakes In Montana

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Earthquakes Stretching from the Flathead Lake region in the northwest corner of the state of Montana, to the Yellowstone National Park where the borders of Montana, Idaho and Wyoming get together, the Intermountain Seismic Belt exists. The Intermountain Seismic Belt has an unbelievable width of 100 kilometers in western Montana alone. This is one of the major reason why Montana is one of the most seismically-active states in the United States of America. During the period of October 3 to November 28 1935 a series of earthquakes, in the state capital of Helena, causing major damage. On the day of October 18th, a major earthquake was felt in western Montana and parts of Wyoming, Idaho and Canada. That is approximately 596,000 sq. kilometers

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