at the conduit was about , much lower than pre-drill estimations of and over. This was attributed to hydrothermal circulation accelerating the cooling of the magma over the nine to ten years since the end of the eruption. Rivers Arie River starts at Mount Unzen and flows to the Ariake Sea. Climate See also List of Special Places of Scenic Beauty, Special Historic Sites and Special Natural Monuments List of volcanic eruptions by death toll List of volcanoes in Japan Mount Pinatubo Unzen Ropeway Unzen Onsen References Bibliography Hoshizumi H., Uto K., Matsumoto A. (2001), Core stratigraphy of the Unzen Scientific Drilling: Volcanic History of the Unzen Volcano, Kyūshū, SW Japan, American Geophysical Union, Fall Meeting 2001 Hoshizumi H., Uto K., Matsumoto A., Kurihara A. (2004), Growth History Of Unzen Volcano, Kyūshū, Japan, American Geophysical Union, Fall Meeting 2004 Sakuma S., Nakada S., Uto K. (2004), Unzen Scientific Drilling Project: Challenging drilling operation into the magmatic conduit shortly after eruption, American Geophysical Union, Fall Meeting 2004 Uto K., Hoshizumi H., Matsumoto A., Oguri K., Nguyen H. (2001), Volcanotectonic history of Shimabara Peninsula and the evolution of Unzen volcano in Southwest Japan, American Geophysical Union, Fall Meeting 2001 Uto K., Nakada S., Shimizu H., Sakuma S., Hoshizumi H. (2004), Overview and the achievement of the Unzen Scientific Drilling Project, American Geophysical Union, Fall Meeting 2004 External links – Japan Meteorological Agency – Japan Meteorological Agency Unzen Volcano – Geological Survey of Japan Looking Into a Volcano: Drilling Unzen – Geotimes Volcanoes of Kyushu Stratovolcanoes of Japan Subduction volcanoes Decade Volcanoes Active volcanoes Mountains of Nagasaki Prefecture Volcanoes of Nagasaki Prefecture Complex volcanoes Lava domes Special Places of Scenic Beauty Tsunamis in Japan 20th-century volcanic events 18th-century volcanic events Highest points of Japanese national parks