Four earthquakes strike off Canada's west coast

pulse 08:31 - 22 October 2018

Map locating the earthquake off the western coast of Canada

The second stronger quake, measuring 6.8 on the Richter scale, occurred 122 miles southwest of the Canadian town more than half an hour later, at 11:16pm.

Four earthquakes -- measuring from 4.9 to 6.8 magnitude -- struck in quick succession off Canadas west coast late Sunday, the US Geological Survey said.

The epicenter of the first 6.6 tremor, at 10:39pm (0549 GMT Monday), was located 135 miles (218 kilometers) southwest of Port Hardy -- a small municipality on the northeastern tip of British Columbia's Vancouver Island -- and 355 miles northwest of Seattle.

Six minutes later, a third 6.5 magnitude tremor was registered 138 miles southwest of Port Hardy -- before a weaker 4.9 quake was recorded in the same place 14 minutes after that.

There were no initial reports of damage or injuries, and no tsunami warnings were issued.

The region is located near the Cascadia subduction zone, a mammoth fault line that lies offshore, stretching from northern Vancouver Island to Northern California in the United States.