Great Falls was rattled by a small earthquake on Thursday, February 12, 2026 – the fourth one felt within two weeks. The quake happened at 6:36 p.m. The U.S. Geological Survey says it registered as a 3.7 quake.
It was centered about 5.7 miles north of Great Falls at a depth of about 6.2 miles. People reported feeling it across Great Falls, Sun Prairie, and Ulm, and also as far away as Dutton and Choteau. A 4.2 quake shook the region on Thursday, January 29, 2026.
It was followed by a smaller quake of 2.7 later that evening, and then a 3.2 on Saturday, January 31 – all likely aftershocks of the first one, as was the quake this evening. There were no injuries and no serious damage reported in any of the quakes.
