Initial reports indicate that it registered as a 4.2 quake, and was centered about nine miles from Great Falls.
Editor's note: “Roadside Geology of Montana” is a finalist in the Medicine and Science category of the 2021 High Plains Book Awards.
Introduction -- Pioneer geologists of the American West / Dr W. Lyle Dockery -- Physical geology -- Regional geography -- Cities, towns and highways / American Association of Petroleum Geologists and ...
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