A volcano in Japan that erupted approximately 7,300 years ago, burying most of the archipelago in thick ash, has been silently preparing to make a powerful comeback, it appears. The Akahoya eruption – known as the strongest volcanic explosions – took place when the Kikai Caldera in Kyūshū, Japan, erupted, spewing about 150 cubic kilometers (36 cu mi) of volcanic material. The blast was so powerful it caused the volcano’s […]