Seismologists said Tuesday an earthquake struck off Canada's Pacific coast province of British Columbia.

The U.S. Geological Survey said the 6.6-magnitude quake's epicenter is 414 miles northwest of Vancouver, British Columbia. It was followed by a 5.7 magnitude aftershock seven minutes later.

There were no immediate reports of damage.

Prince Rupert Royal Canadian Staff Sgt. Jim Vardy said they're not expecting any damage because it struck about 70 miles south east of the Queen Charlotte Islands under the ocean bed in a straight of water. He said there was no threat of a tsunami.

He said minor earthquakes are common off the British Columbia coast.

Click here for updates from the USGS.