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Seismograph Stations

1905 Shoshone, ID M 5½ ±

November 11, 1905 – Shoshone, ID – M5½± At 3:26 p.m. on Saturday, November 11, 1905, a magnitude 5 ½ ± earthquake occurred approximately 5 miles southwest of Shoshone, Idaho. Reports from the town of Shoshone indicated that dishes were knocked from shelves, and cracks occurred in some stone and brick buildings. Widespread damage to […]

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1945 Glenwood, UT M 5.0

November 17, 1945 – Glenwood, UT – M 5.0 In the early evening of Saturday, November 17, 1945 a magnitude 5.0 earthquake occurred approximately 5 miles east of Richfield, Utah. The earthquake alarmed people in the towns of Glenwood and Richfield, Utah where minor damage to chimneys and plaster occurred (Stover & Coffman, 1993). No […]

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1945 Flathead Lake, MT M5.5

September 23, 1943 – Flathead Lake, MT – M 5.5   At 2:57 a.m. on Sunday, September 23, 1945, a magnitude 5.5 earthquake occurred near Lakeside, Montana on the northwest side of Flathead Lake. The earthquake was reported felt in western Montana, northern Idaho and eastern Washington. There were reports of dishes and windows rattling […]

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1929 Lombard, MT M 5.6

February 15, 1929 – Lombard, MT – M 5.6 On February 15, 1929 at 8:00 p.m. a magnitude 5.6 earthquake occurred approximately 20 miles north of Manhattan, Montana. The earthquake was reported felt in the Montana cities of Deer Park, Logan, Trident, Toston, Missoula, Great Falls and Anaconda. Dishes rattled and light fixtures swayed in […]

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1952 Bigfork, MT M5.5

March 31, 1952 – Bigfork, MT – M5.5   A magnitude 5.5 earthquake occurred in Montana at 5:37 p.m. on Monday, March 31, 1952. The epicenter was located approximately 15 miles east of Bigfork, Montana—a town on the northeast shore of Flathead Lake, Montana. Reports from some individuals on the east shore of Flathead Lake […]

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1876 Moroni, UT M 5.0

March 22, 1876 – Moroni, UT – M 5.0 A magnitude 5.0 earthquake occurred in Moroni, Utah on Wednesday, March 22, 1876. The earthquake was felt over an area of 1158 square miles. This is approximately two-thirds of the area of Sanpete County, Utah—the county in which the earthquake occurred. Reports indicate that earthquakes were […]

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1945 Central Idaho M 6.0

February 13, 1945 – Central Idaho – M 6.0 The second large earthquake to strike Central Idaho in less than a year, occurred Tuesday, February 13 at 8:01 p.m. (local time). The earthquake, located approximately 25 miles west northwest of Custer, Idaho, caused buildings and light fixtures to sway, and rattled dishes and window blinds. […]

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