Shiretoko-Iozan

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 44.133°N
  • 145.161°E

  • 1562 m
    5123 ft

  • 285090
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Shiretoko-Iozan.

The Global Volcanism Program has no Weekly Reports available for Shiretoko-Iozan.

The Global Volcanism Program has no Bulletin Reports available for Shiretoko-Iozan.

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1935 Dec 1936 Oct Confirmed 1 Historical Observations NW flank
1890 Jun 15 Unknown Confirmed 1 Historical Observations NW flank
1889 Aug 9 1889 Oct 7 ± 7 days Confirmed 2 Historical Observations NW flank
[ 1880 Nov 24 ] [ 1880 Nov 26 ] Uncertain    
1876 Sep 23 1876 Sep 26 Confirmed 2 Historical Observations NW flank
1857 1858 Confirmed   Historical Observations
0850 ± 500 years Unknown Confirmed   Tephrochronology St-1 tephra

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Photo Gallery


Shiretoko-Iwo-zan, one of many Japanese "sulfur mountains," is seen here in late Spring from the Shiretoko-Goko (Shiretoko Five Lakes) on the west side of the volcano. Shiretoko-Iwo-zan, located at the NE tip of Hokkaido on the Shiretoko Peninsula, is noted for the extrusion of molten sulfur during eruptions in 1889 and 1936. Two large craters at the summit are breached to the NW.

Copyrighted photo by Yasuo Ikeda, 1994 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).
See title for photo information.

Smithsonian Sample Collections Database


There are no samples for Shiretoko-Iozan in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites