Series of offshore earthquakes shake Alaska's Aleutian Islands

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      A moderate earthquake hit the Alaskan archipelago this weekend, followed by several other quakes the next day.

      The first notable quake struck at 4:54 p.m. B.C. time on November 23.

      The U.S. Geological Survey measured it as a 6.3-magnitude tremblor.

      A 6.3-magnitude quake struck near Adak, Alaska, on November 23.
      U.S. Geological Survey

      The epicentre, at a depth of 25 kilometres (16 miles), was located 84 kilometres (52 miles) southeast of Adak, Alaska, offshore from the Andreanof Islands. The islands are part of the Aleutian Islands, located between Russia and the Alaskan mainland.   

      As a tsunami was not expected, no warning was issued.

      Four more offshore quakes occurred in the same region south of the uninhabited Amatignak Island, Alaska (part of the Delarof Islands, which are the western Andreanof Islands), on November 24, ranging from 4.1- to 4.5-magnitude.

      Four quakes struck south of Amagtignak Island, Alaska, on November 24.
      U.S. Geological Survey
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