"Japan has issued a megaquake advisory after a magnitude 7.5 earthquake struck off the eastern coast of Aomori, the northernmost prefecture of Japan's main island of Honshu. Damage from the quake was modest 34 mostly mild injuries and some damage to roads and buildings. Officials said the advisory announced on Tuesday was not a prediction and the probability of a magnitude 8 or larger quake was only about 1%."
"But they hope the advisory will make sure the public is prepared in the event of a powerful quake that could have the devastation of the 2011 disaster that killed nearly 20,000 people. Officials said there was an increased risk of a magnitude-8 or larger quake within the next week and urged residents, especially along coastal areas, to be prepared."
"The Japan Meteorological Agency said Monday's powerful quake temporarily increased potential risks in the regions of Hokkaido and the Sanriku coast. That is where the Pacific plate beneath Japan forms the two trenches the Japan trench and Chishima trench that have caused many large quakes in the past. Experts say the deadly quake and tsunami in 2011 was caused by movement associated with the Japan trench."
Japan issued a megaquake advisory after a magnitude 7.5 earthquake struck off Aomori on Monday, causing modest damage, 34 mostly mild injuries, and some damage to roads and buildings. The advisory is not a prediction and estimates the probability of a magnitude-8 or larger quake at about 1%, but officials warn of an increased risk within the next week and urge coastal residents to prepare. The Japan Meteorological Agency says the quake temporarily increased risks in Hokkaido and the Sanriku coast where the Japan and Chishima trenches sit. The 2011 magnitude-9.0 quake occurred two days after a magnitude-7.3 temblor, producing tsunamis over 15 metres.
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