Numerous people across Montana, from Deer Lodge, to the Big Hole Valley, Missoula, in and around Great Falls, they felt an earthquake.
The quake registered as a magnitude 6.5, and was centered about 44 miles west of Challis, Idaho, at a depth of about 6.1 miles.
Reports started coming in at about 5:55 p.m. on Tuesday. Some of the messages sent to MTN News:
Sarah Reynolds Johnson: "Just had an earthquake - felt it pretty hard here in Missoula, friends in Butte, Great Falls, and Bigfork felt it too!"
Tina Gac Grismer: "Did Great Falls feel the a earthquake? Definitely did in Ulm"
"I just felt an earth quake on couch or am I going nuts"
"Did we just had a little shake? (Earthquake)"
"Just felt a big earthquake!!!!"
We will keep you updated.