Japan issued a megaquake advisory Tuesday after a magnitude 7.5 earthquake struck off the eastern coast of Aomori, the northernmost prefecture of Japan’s main island of Honshu. At least 34 people were injured, the Fire and Disaster Management Agency said. The Japan Meteorological Agency says there’s slight increased risk of a subsequent, magnitude-8 or larger quake within the next week. Officials are urging residents, especially along coastal areas, to be prepared so they can grab an emergency