Offshore earthquake strikes south of Alaska on June 18

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      A sizeable undersea earthquake struck south of the Alaskan coastline and west of British Columbia early this morning.

      It struck at 2:02 a.m. Anchorage time (3:02 Vancouver time) today (June 18), at a depth of 10 kilometres (six miles).

      According to both the Alaska Earthquake Center and the U.S. Geological Survey, it was a 5.3-magnitude temblor.

      The epicentre was located 227 kilometres (141 miles) south of Sand Point, Alaska; 1080 kilometres (670 miles) southwest of Anchorage; and 1705 kilometres (1057 miles) southwest of Juneau, Alaska.

      The U.S. Tsunami Warning System did not issue a tsunami alert for this quake.

      You can follow Craig Takeuchi on Twitter at @cinecraig or on Facebook.