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  • 21 Aug, 2019

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Ibusuki Volcanic Field
The Ibusuki volcanic field, also known as the Ibusuki Volcano or Ibusuki Volcanic Group (指宿火山群), is an area of current volcanic and geothermal activity at the tip of the Satsuma Peninsula, Kagoshima prefecture, Kyushu, Japan. It is administered as part of Ibusuki City and Kirishima-Kinkowan National Park.

Geology

The Ibusuki volcanic field is at the eastern margins of the Ata Caldera and has been estimated to contain 54 km (13 cu mi) of volcanic material. The Ibusuki volcanic field includes the following recent active volcanoes and their vents:

Geothermal

There are about 800 hot springs within 5 km (3.1 mi) of the sea at the southeastern tip of the Satsuma Peninsula. The relatively recently commissioned Yamagawa Binary Power Station uses local geothermal power to generate up to 4990 kW.

Tectonics

The north western sector of the zone is limited by the Onkadobira fault scarp which has been interpreted as part of the rim of the Ata Caldera. The volcanism is associated with the subduction of the Philippine Sea Plate under the Eurasian Plate.

Risk

The field has both tectonic and volcanic risks. With regard to volcanic risks currently the area is in the longest period between eruptions for the last 4000 years. Earthquake swarms that do not appear to be related to the volcanoes have been described. Seismic activation of local faults in the area occurred immediately after the megathrust 2011 Tōhoku earthquake which had its epicenter 1,350 km (840 mi) away.

References

  1. ^ "IAVCEI 2013 Scientific Assembly A Guide for Mid-Conference Field Trip". Retrieved 2022-09-19.
  2. ^ Nakamura, Masato (1980). "Possibility of New Volcanic Activity at Ibusuki Volcanic Field, Kyushu, Japan". Bulletin of the Volcanological Society of Japan. Second Series. 25 (3): 195–205. doi:10.18940/kazanc.25.3_195. ISSN 2433-0590.
  3. ^ Okuno, M.; Nakamura, T.; Kobayashi, T. (1997). "AMS 14C Dating of Historic Eruptions of the Kirishima, Sakurajima and Kaimondake Volcanoes, Southern Kyushu, Japan". Radiocarbon. 40 (2): 825–832. Bibcode:1997Radcb..40..825O. doi:10.1017/S0033822200018786. S2CID 133569925.
  4. ^ Inakura, Hirohito; Naruo, Hideto; Okuno, Mitsuru; Kobayashi, Tetsuo (2014). "Eruptive History of Ikeda Volcano, Ibusuki Area, Southern Kyushu, Japan". Bulletin of the Volcanological Society of Japan. 59 (4): 255–268. doi:10.18940/kazan.59.4_255. ISSN 0453-4360.
  5. ^ "SOCIETY OF ECONOMIC GEOLOGISTS KYUSHU UNIVERSITY STUDENT CHAPTER – SEG KYUDAI FIELD EXCURSION REPORT" (PDF). 2020.
  6. ^ Kondo, Saki; Oyama, Hiroshi; Yamada, Shigeto (2019). "Yamagawa Binary Power Station Geothermal ORC plant in Japan" (PDF). GRC Transactions. 43.
  7. ^ Matumoto, Tadaiti (1965-08-28). "Calderas of Kyusyu" (PDF). Transactions of the Luna Geological Field Conference. Retrieved 2022-09-19.
  8. ^ Kakuta, Toshiki (1984). "LOCAL EARTHQUAKE SWARM OCCURRING IN SOUTH KYUSHU (Japanese)". Journal of Physics of the Earth. 32 (3): 143–160. doi:10.4294/jpe1952.32.143. ISSN 1884-2305.
  9. ^ Opris, A; Enescu, B; Yagi, Y; Zhuang, J (2018). "Triggering and decay characteristics of dynamically activated seismicity in Southwest Japan". Geophysical Journal International. 212 (2): 1010–21. doi:10.1093/gji/ggx456. hdl:2433/231366.
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