http://www.ktvb.com/home/Myster-quake-near-McCall-puzzles-scientists-151925345.html

MCCALL, Idaho -- You could call it a mystery earthquake, a sonic boom, or maybe nothing at all.

Several witnesses report waking up to what they say was a small earthquake south of McCall early Thursday around 4:30 a.m. However, those shaky claims have employees at Idaho's U.S. Geological Survey scratching their heads in disbelief.