This map, provided by Natural Resources Canada, uses a red star to mark the location of a 6.1 magnitude earthquake that struck 157 kilometres west of Port Hardy, off the north coast of Vancouver Island, on Thursday, Aug. 28, 2008.
VANCOUVER -- An earthquake has occurred on the sea floor off B.C., the latest in a series of tremors on the coast since Monday.
Garry Rogers of the Geological Survey of Canada says latest quake had a magnitude of 6.1 and struck 157 kilometres west of Port Hardy, off the north coast of Vancouver Island.
This follows two quakes on Wednesday in the same area, both with magnitudes of around five, and several other tremors earlier in the week.
Rogers says the shaking is happening in an active geological region that often produces swarms of quakes, although he calls this one of the more `vigorous swarms' in the last few years.
He says the quakes are so far offshore it's likely no one felt them and they're too small to trigger a tsunami.
Rogers says this is normal activity for the region and there's nothing to be alarmed about.