A powerful 8.7 magnitude earthquake off the east coast of Russia has prompted widespread tsunami warnings across the Pacific. Areas affected include Hawaii, Alaska, California, and parts of the U.S. West Coast, with evacuation orders issued in Japan. The Japan Meteorological Agency has warned of potential wave heights of up to 3 meters. Authorities in California and Oregon have also issued tsunami watches. Alarm sirens are sounding in Hawaii as residents prepare for possible evacuation. Tsunami advisories have been put in place for various coastal regions, with updates ongoing as the situation develops.