This was the second strongest earthquake in the state of Idaho ever recorded. Amid a pandemic, Idaho also experienced its most forceful earthquake in more than 36 years, the state’s second strongest earthquake ever recorded. A storm system dumped 27” of snow in the Canyon Creek section of Idaho Highway 21, from Grandjean to Banner Summit. No historical earthquake events found in or near Ketchum, ID. That quake measured at 6.9 and happened just after 8 a.m. on October 28th, 1983. It is 303% greater than the overall U.S. average. The 1983 Borah Peak earthquake claimed lives of two people with aftershocks felt for a year afterwards.

Geography and climate. A 6.5 magnitude earthquake shook central Idaho on Tuesday, March 31 and was felt in Washington, Montana, Utah, Nevada and other neighboring states.

A 6.9 magnitude earthquake that happened on Oct. 28, 1983 in the Lost River Range at Borah Peak in Central Idaho is the strongest earthquake in this region. An earthquake rocked eight Northwest states today, killing two small children here and injuring three other people.

The quake was followed by a … A separate earthquake this morning near Big Sky, MT measured 2.6 magnitude at 9:36am. On Tuesday, March 31, 2020 at 5:52 pm MST, an earthquake measuring 6.5 on the moment magnitude scale occurred, centered 45 miles (72 km) west of Challis. Ketchum, Idaho detailed profile.

That quake is the largest in state history and caused extensive damage in central Idaho. Tuesday’s quake happened near the site of the 1983 Borah Peak quake in Idaho.


* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010. The earthquake did cause several slides to fall onto the highway in this section. Earthquake activity: Ketchum-area historical earthquake activity is slightly above Idaho state average.

This increased the risk of avalanches and ITD closed the highway at 2:00 p.m. Tuesday, several hours before the earthquake. The business district of another small Idaho town was devastated. Idaho earthquake aftershock forecast (USGS)