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| Mount Shinmoedake | |
|---|---|
| Name | Shinmoedake |
| Other name | 新燃岳 |
| Elevation m | 1421 |
| Location | Kyushu, Japan |
| Range | Kirishima |
| Coordinates | 31°55′N 130°54′E |
| Type | Stratovolcano |
| Last eruption | 2018–2019 |
Mount Shinmoedake
Mount Shinmoedake is an active stratovolcano in the Kirishima volcanic group on the island of Kyushu, Japan. The peak sits within Kirishima-Kinkōwan National Park and lies near Miyazaki Prefecture and Kagoshima Prefecture boundaries, forming part of the volcanic arc produced by the subduction of the Philippine Sea Plate beneath the Eurasian Plate. The volcano's activity has influenced regional Kumamoto Prefecture and Miyazaki Prefecture landforms, impacted infrastructure in Kagoshima Prefecture, and drawn study from institutions such as the Japan Meteorological Agency, Geospatial Information Authority of Japan, and international researchers from United States Geological Survey collaborations.
Shinmoedake occupies a central position in the Kirishima range along Kyushu, neighbored by peaks like Mount Karakuni, Mount Takachiho-no-mine, and Mount Eboshi, and is proximal to caldera features including Aso Caldera and the volcanic front extending toward Sakurajima. The mountain forms part of watersheds draining into the Kirishima River and coastal basins near Kagoshima Bay, affecting municipalities such as Miyakonojō, Kirishima (city), Kawanabe District, and Kagoshima (city). Transport corridors including the Kyushu Expressway, regional rail lines like the Hisatsu Line, and airports such as Kagoshima Airport and Miyazaki Airport lie within the volcano’s broader influence zone. Nearby protected areas include Kirishima-Kinkōwan National Park, and cultural landscapes link to shrines such as Takachiho Shrine and pilgrimage routes associated with Mount Aso and Mount Takachiho.
The edifice is a silicic-to-intermediate stratovolcano formed on the Shimanto Belt and influenced by crustal structures like the median tectonic line and the Okinawa Trough back-arc system, with magmatism related to the subduction of the Philippine Sea Plate beneath the Eurasian Plate. Petrology studies reference andesite and dacite lavas comparable to products from Sakurajima, Aso, and Unzen, with tephra layers correlated to regional events recorded in cores near Lake Ebinokogen and Lake Miike. Geophysical monitoring by the Japan Meteorological Agency, National Research Institute for Earth Science and Disaster Resilience, and universities such as Kyushu University, University of Tokyo, and Hokkaido University employs seismology, GNSS, InSAR from JAXA satellites, and gas flux measurements linked to instruments developed at Geological Survey of Japan. Melt inclusion analyses relate compositional evolution to processes documented at Mount St. Helens, Mount Fuji, and Mount Pinatubo.
Historic and Holocene eruptions feature explosive Plinian, sub-Plinian, and Vulcanian episodes with pyroclastic flows, ashfall, and tephra dispersal recorded across Kyushu and correlated with deposits in Kagoshima Prefecture, Miyazaki Prefecture, Kumamoto Prefecture, and offshore sediment cores near the East China Sea. Notable events in living memory include eruptions in 1716, 1959, 1991, and a major unrest phase in 2011 with repeated ash emissions impacting Kagoshima Airport and communities near Kirishima Onsen, followed by activity in 2018–2019 studied alongside eruptions at Mount Oyama and eruption comparisons with Mount Merapi. Tephrochronology links Shinmoedake products to regional stratigraphic frameworks used by researchers at Tohoku University, Nagoya University, and Kyoto University.
Hazards include ballistic projectiles, pyroclastic density currents, ashfall, lahars triggered by heavy rainfall from systems like Typhoon Jebi and Typhoon Wipha, and secondary effects on critical infrastructure such as the Kyushu Shinkansen and coastal shipping in Kagoshima Bay. Monitoring responsibilities rest with the Japan Meteorological Agency, local prefectural disaster management offices in Miyazaki Prefecture and Kagoshima Prefecture, and national agencies including the Fire and Disaster Management Agency and the Ministry of Land, Infrastructure, Transport and Tourism. Early warning systems leverage seismic networks from NIED, GNSS networks, and regional communication via NHK, Japan Coast Guard, and municipal emergency broadcasting, coordinated with disaster response units like the Self-Defense Forces and volunteer groups linked to Japanese Red Cross Society chapters. Risk assessments inform land-use planning under frameworks related to the Act on Special Measures Concerning Nuclear Emergency Preparedness in adjacent hazard planning despite differing scopes.
The mountain’s ecosystems range from montane evergreen forests to subalpine vegetation hosting species studied by botanists at Kyushu University Botanical Garden, with flora and fauna overlapping with habitats in Yakushima and Kirishima conservation areas. Volcanic soils support endemic plants recorded in surveys associated with the National Museum of Nature and Science and bird populations monitored by organizations such as BirdLife International partners and local chapters of the Wild Bird Society of Japan. Post-eruption succession research has been conducted by teams from University of the Ryukyus, Seikei University, and international collaborators from University of California, Berkeley and University of Oxford, examining recolonization patterns similar to studies at Mount St. Helens and Surtsey.
Shinmoedake features in Shinto and folk traditions tied to shrines like Kirishima-Jingu and regional myths associated with Amano Iwato narratives and the Yamato period, and its eruptions are recorded in historical chronicles such as the Nihon Shoki and local Edo-period documents held by archives in Kagoshima Prefectural Library and Miyazaki Prefectural Museum of Nature and History. The volcano has influenced agricultural practices in Miyazaki Prefecture and Kagoshima Prefecture, shaping rice cultivation areas near Hyuga Bay and tea plantations like those documented by the Japan Agricultural Research Institute. Cultural responses to eruptions involved coordinated relief from organizations including the Japan Self-Defense Forces and social welfare efforts by Seifu Welfare Foundation and municipal governments in Kirishima (city).
The Kirishima range including Shinmoedake is a destination for hikers using trails connecting to Takachiho-no-mine and the Kirishima Skyline, with access via roadways from Kagoshima and Miyazaki served by bus operators and tour services linked to Japan Railways Group stations such as Kirishima-Jingū Station. Safety advisories from the Japan Meteorological Agency and local tourist bureaus in Kagoshima Prefecture and Miyazaki Prefecture regulate access during elevated alert levels; nearby amenities include hot springs at Kirishima Onsen and visitor centers managed by the Ministry of the Environment. Research- and culture-focused tours reference volcano education programs by institutions like Geological Survey of Japan and university extension programs at Kyushu University and University of Tokyo.
Category:Volcanoes of Kyushu Category:Stratovolcanoes Category:Kirishima Mountains