The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
Narugo (also known as Naruko) volcano is a caldera NW of Sendai city, northern Honshu, Japan. There is only one known historical eruption from Narugo volcano, which was in 837 AD.
Katanuma crater lake is one of the most acid crater lakes of Japan, with a pH of 1.6. Shurado crater on Toyagamori lava dome west of the lake has fumaroles that emit water vapor and SO2. Solfataras are also found on the western shore of Katanuma, and sulfur is mined from sediments on the lake floor.
Volcanic crisis at Sakurajima - updates: A strong earthquake swarm and increased inflation were detected in August 2015 and triggered authorities to raise the alert level, as volcanologists think that a larger eruption could follow. News and updates on the events can be found on this page.
Ibu volcano photos: Ibu in Halmahera is one of the most active, but rarely visited volcanoes in Indonesia. A spectacular lava dome is growing inside the volcano's breached crater, with frequent explosions.
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