Azumayama

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  • Japan
  • Honshu
  • Stratovolcano(es)
  • 1977 CE
  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 37.735°N
  • 140.244°E

  • 1949 m
    6393 ft

  • 283180
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

30 May-5 June 2001

On 29 May the Fukushima Local Meteorological Observatory reported that seismic activity increased slightly beneath Azuma during May. The Coordinating Committee for the Prediction of Volcanic Eruptions' seismic network detected 51 small-magnitude volcanic earthquakes during 21 and 22 May and 39 on 21 May (the most recorded in one day since November 1998). During March four low-frequency tremor events were recorded, while 40 were detected in April.

Source: The Japan Times



 Available Weekly Reports


2001: May


30 May-5 June 2001

On 29 May the Fukushima Local Meteorological Observatory reported that seismic activity increased slightly beneath Azuma during May. The Coordinating Committee for the Prediction of Volcanic Eruptions' seismic network detected 51 small-magnitude volcanic earthquakes during 21 and 22 May and 39 on 21 May (the most recorded in one day since November 1998). During March four low-frequency tremor events were recorded, while 40 were detected in April.

Source: The Japan Times


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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1977 Dec 7 1977 Dec 7 Confirmed 1 Historical Observations Issaikyo (Oana)
[ 1966 May ] [ 1966 Aug ] Uncertain 1   Issaikyo (Oana)
[ 1952 Jun 18 ] [ Unknown ] Uncertain 1   Issaikyo
1950 Feb 10 1950 Feb 19 Confirmed 1 Historical Observations Issaikyo (Oana and NW of Oana)
[ 1914 Nov 12 ] [ 1914 Nov 14 ± 1 days ] Uncertain 1   Issaikyo
[ 1896 Sep 5 ] [ 1896 Sep 19 ] Uncertain 1  
1895 Mar 8 1895 Sep 13 Confirmed 1 Historical Observations Issaikyo (near Oana)
1894 Mar 16 1894 Apr 12 Confirmed 1 Historical Observations Issaikyo (near Oana)
1893 Nov 9 1893 Nov 10 Confirmed 1 Historical Observations Issaikyo
1893 May 19 1893 Jul 13 Confirmed 1 Historical Observations Issaikyo (west of Oana)
[ 1844 ] [ Unknown ] Uncertain 1   Issaikyo (Oana)
1800 (?) Unknown Confirmed   Historical Observations Issaikyo (Oana)
1711 (?) Unknown Confirmed 1 Historical Observations Issaikyo (Oana area)
1331 Unknown Confirmed 1 Historical Observations Issaikyo, Az-OA tephra
0600 ± 200 years Unknown Confirmed   Radiocarbon (corrected) Az-JP6 tephra
0150 BCE ± 200 years Unknown Confirmed   Radiocarbon (corrected) Issaikyo, Az-JP5 tephra
0950 BCE ± 100 years Unknown Confirmed   Radiocarbon (corrected) Issaikyo, Az-JP4 tephra
1800 BCE ± 50 years Unknown Confirmed   Radiocarbon (corrected) Issaikyo, Az-JP3 tephra
2750 BCE ± 200 years Unknown Confirmed   Radiocarbon (corrected) Issaikyo, Az-JP2 tephra
3000 BCE ± 50 years Unknown Confirmed 1 Radiocarbon (corrected) Issaikyo, Az-IS tephra
4150 BCE ± 500 years Unknown Confirmed 3 Radiocarbon (corrected) Azuma Ko-Fuji, Az-KF tephra
4550 BCE ± 1000 years Unknown Confirmed   Tephrochronology Issaikyo-Minami, Az-JP1 tephra
5400 BCE ± 200 years Unknown Confirmed 1 Radiocarbon (corrected) Goshiki-numa, Az-GS tephra
5700 BCE ± 50 years Unknown Confirmed 2 Radiocarbon (corrected) Oke-numa, Az-OK 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.

Hasenaka T, Ui T, Nakamura Y, Hayashi S, 1992. Traverse of Quaternary volcanoes in Japan. 29th Internatl Geol Cong, Kyoto, Field Trip A06, 74 p.

IAVCEI, 1973-80. Post-Miocene Volcanoes of the World. IAVCEI Data Sheets, Rome: Internatl Assoc Volc Chemistry Earth's Interior..

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.

Kudo T, Hoshizumi H, 2006-. Catalog of eruptive events within the last 10,000 years in Japan, database of Japanese active volcanoes. Geol Surv Japan, AIST, http://riodb02.ibase.aist.go.jp/db099/eruption/index.html.

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/.

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.

The Azumayama volcanic group consists of a cluster of stratovolcanoes, shield volcanoes, lava domes, and pyroclastic cones. The andesitic and basaltic complex was constructed in two E-W rows above a relatively high basement of Tertiary sedimentary rocks and granodiorites west of Fukushima city. Volcanic activity has migrated to the east, with the Higashi-Azuma volcano group being the youngest. The symmetrical Azuma-Kofuji crater and a nearby fumarolic area on the flank of Issaikyo volcano are popular tourist destinations. The Azumayama complex contains several crater lakes, including Goshikinuma and Okenuma. Historical eruptions, mostly small phreatic explosions, have been restricted to Issaikyo volcano at the northern end of the Higashiyama group.