A small earthquake caused the booming noise reported by some residents in Burlington, Ont., early Monday morning.
Natural Resources Canada confirms it was a 2.3-magnitude quake centred under Lake Ontario about seven kilometres east of the city that caused the big bang reported around 4:30 a.m. Monday.
Several people contacted the CityNews newsroom Monday morning wanting to know what caused the strange noise. About a dozen others contacted Halton Regional Police.
Natural Resources Canada said Lake Ontario experiences about five to 10 small quakes every year.