Hachimantai

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 39.958°N
  • 140.854°E

  • 1613 m
    5291 ft

  • 283250
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Hachimantai.

The Global Volcanism Program has no Weekly Reports available for Hachimantai.

The Global Volcanism Program has no Bulletin Reports available for Hachimantai.

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
5350 BCE (?) Unknown Confirmed   Tephrochronology
7900 BCE ± 150 years Unknown Confirmed   Radiocarbon (corrected)

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


A series of explosion craters, some filled by lakes, dot the undulating summit plateau of Hachimantai volcano. Hachimantai was constructed from widely scattered vents during the Pleistocene and is capped with andesitic lavas from vents in the center of the complex. Circular craters are located near Komono-more and Mokko-dake in the center of the plateau. No historical eruptions have been recorded at Hachimantai, but active solfataras are found on the western and southern flanks of the massif.

Photo by Ichio Moriya (Kanazawa University).
See title for photo information.

Smithsonian Sample Collections Database


The following 2 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections. Catalog number links will open a window with more information.

Catalog Number Sample Description
NMNH 113862 Andesite
NMNH 113863 Hypersthene andesite with augite and olivine

Affiliated Sites