Tsunami advisories for Alaska and Hawaii were canceled Saturday after officials determined waves from a powerful earthquake in the northern Pacific were too small to pose a threat. A tsunami of less than 4 inches (10 centimeters) was recorded Friday night at Shemya, Alaska, at the western end of the Aleutians, the National Weather Service said. Alaska's tsunami warning, made after an 8.3 magnitude earthquake struck off Japan's northern coast on Saturday, prompted more than two dozen people on a remote Aleutian island to take refuge in an underground shelter, the Associated Press reported.
