People on Montreal's West Island and in the Vaudreuil region reported a loud boom followed by a vibration at about 8 p.m. Tuesday.
Quebec provincial police said they received several calls about the incident, and had no reports of explosions or fires.
Andrew Fazekas, a member of the Royal Astronomical Society, felt the tremor from his home.
He told CBC it possibly could have been a shockwave caused by a meteorite entering the atmosphere.
Experts will analyze the data Wednesday, to confirm whether or not it was a sonic boom.