Nikko

Photo of this volcano
  • 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) Citation IconCite this Report


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.

Bulletin Reports - Index


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




Information is preliminary and subject to change. All times are local (unless otherwise noted)


July 1979 (SEAN 04:07) Citation IconCite this Report


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.


November 1980 (SEAN 05:11) Citation IconCite this Report


No signs of activity since July 1979

Nikko has shown no signs of activity since July 1979.

Information Contacts: JMSA, Tokyo; JMA, Tokyo.


December 1980 (SEAN 05:12) Citation IconCite this Report


No observation made

Nikko was not observed by JMSA in November or December.

Information Contacts: JMA, Tokyo.


November 1985 (SEAN 10:11) Citation IconCite this Report


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.


December 1990 (BGVN 15:12) Citation IconCite this Report


No water discoloration seen in 1990

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

Information Contacts: Hydrographic Department, JMSA.

Eruptive History


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.

Photo Gallery


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).
See title for photo information.

Smithsonian Sample Collections Database


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

Affiliated Sites