A magnitude 7.7 earthquake struck off the west coast of Canada and a tsunami warning was issued, authorities said, but there were no immediate reports of major damage, according to AP.

The U.S. Geological Survey said the quake hit the Queen Charlotte Islands just after 8 p.m. local time Saturday, October 27 at a depth of about 3 miles (5 kilometers) and was centered 96 miles (155 kilometers) south of Masset, British Columbia.

The National Weather Service issued a tsunami warning for coastal areas of British Columbia and southern Alaska. The first wave of the small tsunami, about 4 inches (101.6 millimeters), hit the southeast Alaska coastal community of Craig.

A 1.5-foot (.46-meter) wave was reported off Langara Island on the northeast tip of Queen Charlotte, according to the Emergency Info British Columbia. The USGS said the 7.7 magnitude quake shook the area and was followed by a 5.8 magnitude aftershock several minutes later.

The U.S. Coast Guard in Alaska said it was trying to warn everyone with a boat on the water to prepare for a potential tsunami.

Lt. Bernard Auth of the Juneau Command Center said the Coast Guard was working with local authorities to alert people in coastal towns to take precautions.

The quake struck 25 miles (40 kilometers) south of Sandspit, British Columbia, on the Haida Gwaii archipelago, formerly known as the Queen Charlotte Islands. People in coastal areas were advised to move to higher ground.