How often do meteorites and objects from space hit us?
Actually, pretty often, we just don't have cameras and detection equipment everywhere, so when a sonic boom-inducing event like in the Ural mountains of Russia occurs, it is big news
. It blew out windows and injured hundreds.
The scariest part; the Chelyabinsk region a thousand miles east of Moscow is home to not just factories and homes, but also a nuclear power plant and the Mayak atomic waste storage and treatment center.