A series of earthquakes with magnitudes of 7 or 8 may occur after a 7.5 magnitude quake struck off the east coast of Aomori Prefecture on Monday, a research institute has said. https://www.japantimes.co.jp/news/2025/12/12/japan/tohoku-university-magaquakes-warning/?utm_medium=Social&utm_source=mastodon #japan #tohokuuniversity #aomori #earthquakes #disasterpreparedness