A magnitude 7.8 earthquake struck off Russia's coast on Thursday, prompting a tsunami risk in the Pacific Ocean.

A tsunami advisory was initially issued for Alaska's Aleutian Islands, but was later canceled by the Pacific Tsunami Warning Center. The center also determined that there was no danger of a hazardous tsunami wave in Hawaii or along the Pacific coasts of Canada or the contiguous U.S.

Dangerous waves are still possible along the coast of Russia near the epicenter of the quake.

The epicenter occurred in the same area as the magnitude 8.8 earthquake that struck the region on July 30, which generated a far-reaching tsunami.

A tsunami is a series of waves, and impacts can vary significantly from one coastal area to another based on the topography, shape and elevation of the sh

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