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.
Latest quakes in Greece: Greece has a lot of earthquake activity, but most of them occur around the margin of the Aegean microplate. The Cycladic islands are located in its center and therefore seismically comparably quiet.
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