Kussharo

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 43.608°N
  • 144.443°E

  • 574 m
    1883 ft

  • 285080
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Kussharo.

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

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

Eruptive History


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


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1320 ± 300 years Unknown Confirmed   Tephrochronology Atosanupuri, At-a tephra
0700 (?) Unknown Confirmed   Tephrochronology Atosanupuri
0450 (?) Unknown Confirmed   Tephrochronology Atosanupuri, At-b tephra
1550 BCE ± 2000 years Unknown Confirmed   Tephrochronology Atosanupuri
3550 BCE (?) Unknown Confirmed   Tephrochronology Atosanupuri
5800 BCE ± 2250 years Unknown Confirmed   Tephrochronology Atosanupuri

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


The 20 x 26 km Kutcharo caldera, seen here from its west rim, is the largest of a cluster of calderas in NE Hokkaido. It formed around 30,000 years ago. Naka-jima, a Holocene post-caldera lava-dome complex, forms the large island at the left in Lake Kutcharo, which fills much of the western half of the caldera. The Atosanupuri stratovolcano and lava dome complex is located near the center of the caldera, east of the crescent-shaped Lake Kutcharo. Atosanupuri erupted about 1000 years ago, and remains fumarolically active.

Photo by Lee Siebert, 1977 (Smithsonian Institution).
See title for photo information.
A cluster of lava domes is located in the center of Kutcharo caldera, partially filled by Lake Kutcharo (upper right). Light-colored areas of hydrothermal alteration cover the slopes of Atosanupuri (left), seen here from the east with the rounded Sawanchisappu lava dome to its right. The far western wall of the 20 x 26 km Kutcharo caldera lies in the clouds at the far end of the lake.

Photo by Lee Siebert, 1977 (Smithsonian Institution).
See title for photo information.
Atosanupuri lava dome, its hydrothermally altered flanks only sparsely vegetated, was emplaced about 1000 years ago. This marks the latest known eruption of Kutcharo volcano. The 900-m-wide dome was constructed within a 1-km-wide explosion crater. Atosanupuri is one of a cluster of lava domes that occupy the eastern side of Kutcharo caldera.

Photo by Lee Siebert, 1977 (Smithsonian Institution).
See title for photo information.
Intense fumarolic activity occurs on the margins of Atosanupuri lava dome and along fissures cutting the dome. Constant high-temperature emisson of steam and gas has extensively altered rocks on the dome. Areas of sulfur deposition such as this are common and have been mined since 1887.

Photo by Lee Siebert, 1977 (Smithsonian Institution).
See title for photo information.
Souvenir vendors at Atosanupuri volcano take advantage of intense fumarolic activity to cook baskets of hard-boiled eggs for visiting tourists. Atosanupuri is the youngest of a group of lava domes on the east side of Kutcharo caldera. Its last known eruption occurred about 1000 years ago, but fumarolic areas abound on the margins of the dome and on radial fissures cutting it.

Photo by Lee Siebert, 1977 (Smithsonian Institution).
See title for photo information.

Smithsonian Sample Collections Database


The following 14 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 112882 Pyroxene dacite
NMNH 112882 Pyroxene dacite
NMNH 112883 Pyroxene dacite
NMNH 112883 Pyroxene dacite
NMNH 112884 Pyroxene dacite
NMNH 112884 Pyroxene dacite
NMNH 112885 Pyroxene andesite
NMNH 112885 Pyroxene andesite
NMNH 112886 Pumice
NMNH 112887 Pyroxene andesite
NMNH 112888 Pyroxene andesite
NMNH 112888 Pyroxene andesite
NMNH 116886 Pumice
NMNH 116887 Pyroxene andesite

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