An earthquake with a preliminary magnitude of 6.4 struck off the coast of Vancouver Island on Thursday morning, part of an ongoing “swarm” of quakes being detected off the British Columbia coast.
The quake occurred at 8:08 a.m. PT at a depth of 10 kilometres, 183 kilometres southwest of Port Alice, B.C., according to Earthquakes Canada.
The agency says there is no tsunami expected and no damage was expected, but the earthquake might have been felt by some residents of Vancouver Island.
The large quake was followed by one preliminarily measured at 4.3 magnitude at 8:35 a.m. PT, and another at 4.9 magnitude, both near the same location.
A dozen earthquakes have now been detected in B.C. waters since the start of July, several of them measured at a magnitude greater than 5.0.
A notice posted to the Earthquakes Canada website says the agency is tracking a “swarm of earthquakes offshore Vancouver Island, at the intersection of the northern Juan de Fuca Ridge, Sovanco Fracture Zone and Nootka Fault Zone.”