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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 42.12°N
  • 140.45°E

  • 356 m
    1168 ft

  • 285805
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Nigorikawa.

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

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

Basic Data

Volcano Number

Last Known Eruption



Unknown - Unrest / Pleistocene

356 m / 1168 ft


Volcano Types


Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Geological Summary

The Mori geothermal field is located in the late-Pleistocene Nigorikawa caldera in SW Hokkaido. The small 3-km-wide caldera along the shores of Uchiura Bay WNW of Komagatake volcano, was formed during a major explosive eruption about 12,000 years ago. The caldera-forming eruption included the emplacement of pyroclastic-fall and -surge deposits and pyroclastic-flow deposits that extend north and west to the Pacific coast. The flat-bottomed caldera floor is intersected by roads and houses of the town of Nigorigawa, and a river of the same name drains the caldera to the NE through a notch in the caldera rim.


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Hanano, M, Kajiwara, T, Hishi, Y, Arai, F, Asanuma, M, Sato, K, Takanohashi, M , 2005. Overview of Production at the Mori Geothermal Field, Japan. Proceedings World Geothermal Congress 2005, Antalya, Turkey, 24-29 April 2005.

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

Ishikawa T, Katsui Y, Oba Y, Satoh H, 1969. Some problems of the calderas in Hokkaido. Bull Volc Soc Japan (Kazan), 14: 97-108.

Kurozumi H, Doi N, 2003. Inner structure of the Nigorikawa caldera, Hokkaido, Japan. Bull Volc Soc Japan (Kazan), 48: 259-274 (in Japanese with English abs).

Nakano S, Yamamoto T, Iwaya T, Itoh J, Takada A, 2001-. Quaternary Volcanoes of Japan. Geol Surv Japan, AIST,

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 Global Volcanism Program is not aware of any Holocene eruptions from Nigorikawa. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Nigorikawa page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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.




Feature Name Feature Type Elevation Latitude Longitude
Nigorikawa Pleistocene caldera


Feature Name Feature Type Elevation Latitude Longitude
Mori Geothermal Field Thermal

Photo Gallery

Steam rises from a geothermal plant on the north side of Nigorigawa caldera in SW Hokkaido. The caldera, located along the shores of Uchiura Bay WNW of Komaga-take volcano, was formed during a major explosive eruption about 12,900 +/- 270 years ago. The flat-bottomed caldera floor is criss-crossed by the roads and houses of the town of Nigorigawa, and a river of the same name drains the caldera to the NW through a notch in the caldera rim.

Copyrighed photo by Tadahide Ui (Japanese Quaternary Volcanoes database, RIODB, and Geol Surv Japan, AIST,

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of Nigorikawa Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.