August 30, 1962 – Cache Valley, UT – M 5.7 On Thursday, August 30, 1962 at 6:35 a.m., a magnitude 5.7 earthquake occurred at the Utah-Idaho border, north of Richmond, Utah. The earthquake was reported felt in six states: Utah, Idaho, Wyoming, Montana, Colorado and Nevada. There were no deaths or serious injuries reported for […]
Read MoreMarch 27, 1975 – Pocatello Valley, ID – M 6.0 A magnitude 6.0 earthquake occurred approximately 15 miles southwest of Malad City, Idaho, on Thursday, March 27, 1975 at 7:31 p.m. Shaking from the earthquake was reported felt as far north as Idaho Falls, Idaho, as far south as Richfield, Utah, as far east as […]
Read MoreJune 12, 1930 – Grover, WY – M 5.8 In the early hours of Thursday, June 12, 1930, a magnitude 5.8 earthquake occurred in Grover, Wyoming—approximately 10 miles north of Afton, Wyoming. The shock was widely felt in the community of Grover. Loud noise accompanied the earthquake. Cracking occurred in a building and a swimming […]
Read MoreFebruary 3, 1994 – Draney Peak, ID – M 5.9 A magnitude 5.9 earthquake occurred approximately 10 miles west of Afton, Wyoming at 2:05 a.m. on Thursday, February 3, 1994. The earthquake was felt in parts of four states: Idaho, Wyoming, Utah and Colorado. The strongest shaking was reported felt in and around the Star […]
Read MoreNovember 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 […]
Read MoreFebruary 29, 1928 – Helena ,MT – M 5½± The 1928 Helena, Montana earthquake had no reported injuries or damage. The shaking startled people throughout the city of Helena and was more noticeable on upper floors of buildings with two or more stories above ground. The shaking was severe enough to disrupt a trial […]
Read MoreOctober 28, 1983 – Borah Peak, ID – M 7.3 Mainshock The M7.3 Borah Peak mainshock occurred at 8:06 a.m. on October 28, 1983, rupturing portions of the Lost River fault and the Lone Pine fault for ~30-60 s. The earthquake created a 20+ mi long fault scarp from ~3 mi (5 km) E of […]
Read MoreJuly 12, 1944 – Central Idaho – M 6.1 On Wednesday, July 12, 1944 at 12:30 p.m. (local time), a magnitude 6.1 earthquake occurred in the Central Idaho area, approximately 20 miles west of Custer, Idaho. The shaking caused some individuals to flee homes and other buildings, but no injuries were reported. There were reports […]
Read MoreFebruary 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. […]
Read MoreJune 30, 1975 – Yellowstone National Park, WY – M 6.1 This earthquake was located approximately 5 miles ESE of Norris Junction, in Yellowstone National Park. According to newspaper accounts, no casualties resulted from the earthquake and damage was minor. Near the epicenter, telephone service was temporarily knocked out. The earthquake also dislodged boulders that […]
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