Nikko

Photo of this volcano
Google Earth icon
  Google Earth Placemark
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 23.078°N
  • 142.326°E

  • -392 m
    -1286 ft

  • 284132
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: December 1990 (BGVN 15:12)


No water discoloration seen in 1990

No discolorations were observed at . . . Nikko . . . during 1990.

Information Contacts: Hydrographic Department, JMSA.

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

Index of Bulletin Reports


Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

07/1979 (SEAN 04:07) Water discoloration on 12 July 1979 first evidence of activity

11/1980 (SEAN 05:11) No signs of activity since July 1979

12/1980 (SEAN 05:12) No observation made

11/1985 (SEAN 10:11) No water discoloration observed, December 1983-December 1985

12/1990 (BGVN 15:12) No water discoloration seen in 1990




Bulletin Reports

All information contained in these reports is preliminary and subject to change.


07/1979 (SEAN 04:07) Water discoloration on 12 July 1979 first evidence of activity

At Nikko, not previously known to be active, discolored water was seen on 12 July. A JMSA survey vessel recorded a depth of 612 m to Nikko's summit in 1977.

Information Contacts: JMA, Tokyo.

11/1980 (SEAN 05:11) No signs of activity since July 1979

Nikko has shown no signs of activity since July 1979.

Information Contacts: JMSA, Tokyo; JMA, Tokyo.

12/1980 (SEAN 05:12) No observation made

Nikko was not observed by JMSA in November or December.

Information Contacts: JMA, Tokyo.

11/1985 (SEAN 10:11) No water discoloration observed, December 1983-December 1985

JMSA has continued frequent aerial monitoring of several known submarine volcanoes. Volcanic activity has often been observed at Fukutoku-okanoba during overflights since late 1983, but no water discoloration has been seen at Kasuga, Nikko, or Fukujin.

Information Contacts: JMA, Tokyo.

12/1990 (BGVN 15:12) No water discoloration seen in 1990

No discolorations were observed at . . . Nikko . . . during 1990.

Information Contacts: Hydrographic Department, JMSA.

Nikko submarine volcano is a massive seamount that rises from nearly 3 km depth to within 392 m of the sea surface at the SE end of a submarine ridge segment extending from Minami-Ioto island. Two large cones at the basaltic-to-andesitic volcano have been constructed on the NW and NE rims of a roughly 3-km-wide, flat-floored submarine caldera, whose rim is prominently displayed on the southern side, but largely buried on the north. A smaller cones lies on the SE caldera floor. The larger NW cone lies within a partially buried crater and displays hydrothermal activity. Discolored water was observed in July 1979, but none has been observed during semi-regular seasonal reconnaissance flights since then. Hydrothermal venting was documented during a recent NOAA expedition.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1979 Jul 12 ] [ Unknown ] Uncertain 0  

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.


Synonyms

Nikko-ba | Nikko-kaizan
Two large cones have been constructed on the NW and NE rims of a roughly 3-km-wide, flat-floored submarine caldera at Nikko volcano. The caldera rim is prominently displayed on the southern side, but largely buried on the north. A smaller cones lies on the SE caldera floor. Discolored water has frequently been observed above Nikko seamount, and hydrothermal venting was documented at the main cone during a recent NOAA expedition.

Image courtesy of NOAA, 2003 (http://oceanexplorer.noaa.gov/explorations/03fire/logs/mar02/media/nikko.html).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Bloomer S H, Stern R J, Smoot N C, 1989. Physical volcanology of the submarine Mariana and Volcano arcs. Bull Volc, 51: 210-224.

Japan Meteorological Agency, 1996. National Catalogue of the Active Volcanoes in Japan (second edition). Tokyo: Japan Meteorological Agency, 502 p (in Japanese).

Japan Meteorological Agency, 2013. National Catalogue of the Active Volcanoes in Japan (fourth edition, English version). Japan Meteorological Agency.

Massoth G, Chadwick B, 2003. Submarine arc volcanoes. Nat Oceanic Atmosph Admin (NOAA, http://oceanexplorer.noaa.gov/explorations/03fire (accessed April 25, 2003).

Nakano S, Yamamoto T, Iwaya T, Itoh J, Takada A, 2001-. Quaternary Volcanoes of Japan. Geol Surv Japan, AIST, http://www.aist.go.jp/RIODB/strata/VOL_JP/.

Smithsonian Institution-SEAN, 1975-89. [Monthly event reports]. Bull Scientific Event Alert Network (SEAN), v 1-14.

Yuasa M, Murakami F, Saito E, Watanabe K, 1991. Submarine topography of seamounts on the volcanic front of the Izu-Ogasawara (Bonin) Arc. Bull Geol Surv Japan, 42: 703-743.

Volcano Types

Submarine

Tectonic Setting

Subduction zone
Crustal thickness unknown

Rock Types

Major
Basalt / Picro-Basalt
Andesite / Basaltic Andesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
0
0

Affiliated Databases

Large Eruptions of Nikko 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).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.