Yup, you probably felt the rolling shortly before 6pm on Tuesday night. A 6.5 earthquake shook through Idaho and was felt in many areas of southwest Montana.
None of the earthquakes are terribly large, oh wait...There's one at magnitude 5.3. Several in the 2, 3, and 4 magnitude range but there's A TON OF THEM all tightly centered just east of Soda Springs, Idaho.
If you're traveling through central Idaho soon, be aware that Magic Reservoir has water running over it's spill way and West Magic Road has experienced recent flooding.