This page summarizes earthquakes in Carter County (United States). The most recently recorded event was a magnitude — earthquake near United States on —. All event lists and map markers are limited to the last 30 days.
Carter County is a county located in the U.S. state of Montana. As of the 2020 census, the population was 1,415, making it the seventh-least populous county in Montana. The county seat is Ekalaka.
In 2026, Carter County recorded 31 earthquakes within United States. The average magnitude was M2.28. The strongest event reached M3.4.
By event count in 2026, this region ranks #71 within United States.
