Rishirizan

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 45.179°N
  • 141.242°E

  • 1721 m
    5645 ft

  • 285041
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Rishirizan.

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

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

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
5830 BCE ± 300 years Unknown Confirmed   Radiocarbon (uncorrected) Rs-Ho 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


Rishiri is a highly dissected andesitic stratovolcano that forms an island west of the northern tip of Hokkaido. The main edifice ceased erupting during the Pleistocene, and extensive erosion has created a rugged dissected summit flanked by radial knife-edged ridges. Scoria cones and maars on the lower flanks have been active during the late Pleistocene and early Holocene.

Photo by Yoshihiro Ishizuka, 1997 (Hokkaido University).
See title for photo information.
Rishiri volcano is a highly dissected stratovolcano that forms an island off the NW tip of Hokkaido. The composite cone (center) and flank scoria cones (middle ground) are mirrored on the surface of a maar on the lower south flank. The stratovolcano was constructed during the Pleistocene. Scoria cones and maars on the lower flanks erupted 30,000-8,000 years ago.

Photo by Yoshihiro Ishizuka, 1993 (Hokkaido University).
See title for photo information.

Smithsonian Sample Collections Database


The following 1 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 117586 Basalt

Affiliated Sites