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.
Smith Rock volcano (also known as Sumisu-jima, or Smith Island) is a steep, 136 m high pinnacle rising vertically above the sea surface. It is part of the southern rim of a 9 km wide submarine caldera belonging to a larger seamount.
Numerous submarine eruptions have occurred from the volcano, the last one in 1916. Since the 1970s, changes in sea water color have been observed frequently. In October 1992, a 6-km-long zone of discolored water was observed near the shalow Shirane rock.
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