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4.6 Magnitude Quake Shakes Southwest Montana, shocks Felt in Idaho
-S Web site says it was felt also in Helena, Butte and as far away as Missoula.
U-S-G-S official John Bellini says the quake was on the lower end. He says it had the kind of strength to crack plaster, windows or an old house with a brick chimney in poor condition.
So far, there is no damage reported in Montana's Beaverhead County.