A 7.7-magnitude earthquake struck off British Columbia at 8:04 p.m. Saturday night, prompting a tsunami warning for coastal areas within the Canadian province and from the north tip of Vancouver Island to Cape Decision, Alaska.
Minutes later the West Coast and Alaska Tsunami Warning Center issued a statement requesting that people in low-lying areas within this zone "should be alert to instructions from their local emergency officials" and "if in a tsunami warning coastal area, move inland to higher ground."
A warning means widespread coastal flooding could be imminent within the warning zone.
A Pacific-wide tsunami threat is not anticipated.
There were no immediate reports of injuries or damage.
As the accompanying USGS image shows, this is the Queen Charlotte Islands region west of British Columbia.