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Date: 2012-12-24 12:08:54Alternative energy Hydrothermal vents Volcanology Beppu Ōita Ōita Prefecture Geothermal electricity Hot spring Kankaiji Onsen Onsen Energy Geology Geothermal energy | Geo-Heat Center Quarterly Bulletin Vol. 17, No. 2Document is deleted from original location. Download Document from Web Archive |