Kujusan

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 33.086°N
  • 131.249°E

  • 1791 m
    5874 ft

  • 282120
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for Kujusan.



 Available Weekly Reports

There are no Weekly Reports available for Kujusan.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1995 Oct 11 1996 Mar 24 Confirmed 1 Historical Observations Hosho lava dome (east flank)
[ 1738 Aug 13 ] [ Unknown ] Uncertain 2  
1675 Jun (?) Unknown Confirmed 2 Historical Observations
1662 Jan 26 (?) Unknown Confirmed 2 Historical Observations
0370 ± 40 years Unknown Confirmed 3 Radiocarbon (corrected) Kuro-dake
0100 BCE ± 300 years Unknown Confirmed 4 Radiocarbon (corrected) Komekubo crater, Tephra layer KB
0990 BCE ± 1000 years Unknown Confirmed 4 Radiocarbon (corrected) Komekubo crater, Tephra layer KA
1720 BCE ± 300 years Unknown Confirmed   Tephrochronology Taisen-Minami
2440 BCE ± 300 years Unknown Confirmed 4 Radiocarbon (corrected) Danbaru, DS tephra
3110 BCE ± 500 years Unknown Confirmed   Tephrochronology Iwaigo-dake, Ogigahana, Hizengajo
3780 BCE ± 500 years Unknown Confirmed 4 Radiocarbon (corrected) Taisen-Hokubu lava dome, Tephra layer A1
4490 BCE ± 500 years Unknown Confirmed   Tephrochronology Tachi-san, Gakurokuji
7180 BCE ± 1000 years Unknown Confirmed   Tephrochronology Sensui-zan
9160 BCE ± 1000 years Unknown Confirmed 4 Radiocarbon (corrected) A2 tephra

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Japan Meteorological Agency, 1996. National Catalogue of the Active Volcanoes in Japan (second edition). Tokyo: Japan Meteorological Agency, 502 p (in Japanese).

Japan Meteorological Agency, 2013. National Catalogue of the Active Volcanoes in Japan (fourth edition, English version). Japan Meteorological Agency.

Kamata H, Kobayashi T, 1997. The eruptive rate and history of Kuju volcano in Japan during the past 15,000 years. J Volc Geotherm Res, 76: 163-171.

Kuno H, 1962. Japan, Taiwan and Marianas. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 11: 1-332.

Nakano S, Yamamoto T, Iwaya T, Itoh J, Takada A, 2001-. Quaternary Volcanoes of Japan. Geol Surv Japan, AIST, http://www.aist.go.jp/RIODB/strata/VOL_JP/.

Ono K, Kubotera A, Ota K, 1981. Aso volcano. In: Kubotera A (ed) {Symp Arc Volc Field Excur Guide to Sakurajima, Kirishima and Aso Volcanoes, Part 3}, Tokyo: Volc Soc Japan, p 33-52.

Smithsonian Institution-GVN, 1990-. [Monthly event reports]. Bull Global Volc Network, v 15-33.

Sudo Y, Ono H, Hurst A W, Tsutsui T, Mori T, Nakaboh M, Matsumoto Y, Sako M, Yoshikawa S, Tanaka M, Kobayashi Y, Hashimoto T, Hoka T, Yamada T, Masuda H, Kikuchi S, 1998. Seismic activity and ground deformation associated with 1995 phreatic eruption of Kuju volcano, Kyushu, Japan. J Volc Geotherm Res, 81: 245-267.

Sumi K, Takashima I, 1976. Absolute ages of the hydrothermal alteration halos and associated volcanic rocks in some Japanese geothermal fields. In: {Proc 2nd United Nations Symp Devel Use Geotherm Resour, San Francisco}, 1: 625-634.

Yamasaki T, Hayashi M, 1976. Geologic background of Otake and other geothermal areas in north-central Kyushu, southwestern Japan. In: {Proc 2nd United Nations Symp Devel Use Geotherm Resour, San Francisco}, Washington D C: U S Government Printing Office, 1: 673-684.

Kujusan is a complex of stratovolcanoes and lava domes lying NE of Aso caldera in north-central Kyushu. The group consists of 16 andesitic lava domes, five andesitic stratovolcanoes, and one basaltic cone. Activity dates back about 150,000 years. Six major andesitic-to-dacitic tephra deposits, many associated with the growth of lava domes, have been recorded during the Holocene. Eruptive activity has migrated systematically eastward during the past 5000 years. The latest magmatic activity occurred about 1600 years ago, when Kurodake lava dome at the E end of the complex was formed. The first reports of historical eruptions were in the 17th and 18th centuries, when phreatic or hydrothermal activity occurred. There are also many hot springs and hydrothermal fields. A fumarole on Hosho lava dome was the site of a sulfur mine for at least 500 years. Two geothermal power plants are in operation at Kuju.