A 6.5 magnitude earthquake occurred at 5:52 p.m. northwest of Stanley on Tuesday, according to the U.S. Geological Survey.
A map on the USGS website put the quake about 4 miles north of state Highway 21 at the point where it crosses Capehorn Creek and makes a loop around the northern edge of the Sawtooth Mountains.
According to the Custer County Sheriff’s Office, no damage has been reported from the quake.
A 4.6 magnitude aftershock was reported at 6:27 p.m. farther south, along Swamp Creek about 3 miles southwest of Highway 21.
This is a developing story. Check back with mtexpress.com for more.