GREAT FALLS — Parts of Montana were rocked by an earthquake on Thursday, January 29, 2026. Was there an earthquake quake that just shook the houseJust felt an earthquake out in Sun PrairieWe have also received reports that people felt it in Chester, Shelby, Bigfork, Helena, and White Sulphur Springs. Deputy 911 Director, Kelly Johanneck, confirmed with the US National Weather Service Great Falls Montana that it was an earthquake. According to the USGS, a 5.3 magnitude earthquake struck northeastern Montana on May 15th, 1909. Although it has been some time since the state has seen a destructive earthquake, small quakes occur several times every day.