Yokoate-jima

Photo of this volcano
Google Earth icon
  Google Earth Placemark
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 28.797°N
  • 128.997°E

  • 495 m
    1624 ft

  • 282021
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Yokoate-jima.

The Global Volcanism Program has no Weekly Reports available for Yokoate-jima.

The Global Volcanism Program has no Bulletin Reports available for Yokoate-jima.

Yokoate-jima is a small, 3.5-km-long, dumbbell-shaped island NW of Amami Oshima Island at the SW end of the Tokara island chain. Two peaks, Higashimine on the east and Nishimine on the west, form the andesitic island. The 495-m-high Higashimine, the high point of the island, has a steep-walled, well-preserved summit crater. An arcuate ridge east of Yokoate-jima appears to be part of 7 x 10 km wide submarine caldera, with Yokoate-jima and Kannone-jima (NNE of Yokoate-jima) being post-caldera cones (Nakano et al., 2001-). Yokoate-sho (Yokoate Reef) and Kannone Kaikyu (Kannone Knoll) lie to NNW and NE of Yokoate-jima, respectively. Historical documents at the end of the Edo Period mention ash plumes from Yokoate-jima.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1835 ± 30 years Unknown Confirmed 2 Historical Observations

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.



Cones
Feature Name Feature Type Elevation Latitude Longitude
Higashimine Cone 495 m
Kannone Kaikyu Submarine cone
Kannone-jima Cone 280 m
Nishimine Cone 259 m
Yokoate-sho Submarine cone
The dumbbell-shaped island of Yokoate-jima lies at the bottom-center part of this NASA Landsat image (with north to the top). The small, 3.5-km-long Yokoate-jima and Kannone-jima to the north are likely post-caldera cones of a large submarine caldera. Yokoate-jima consists of two volcanic cones forming Nishimine (West Peak) on the left and Highashimine (East Peak ) with its symmetrical summit crater on the right. Historical documents from the end of the Edo Period reported ash plumes from Yokoate-jima.

NASA Landsat7 image (worldwind.arc.nasa.gov)
Nishi-mine, the western peak of Yokoate-jima, is seen from the NW with a road visible at the left that reaches the summit crater. Yokoate-jima is a small, 3.5-km-long, dumbbell-shaped island at the SW end of the Tokara island chain. Two peaks, Higashi-mine on the east and Nishi-mine on the west, form the andesitic island. Yokoate-jima is a post-caldera cone of a 7 x 10 km wide submarine caldera. Historical documents at the end of the Edo Period mention ash plumes from Yokoate-jima.

Copyrighted photo by Shun Nakano, 2004 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).

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.

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

Japan Association Quaternary Research, 1987. Quaternary Maps of Japan: Landforms, Geology, and Tectonics. Tokyo: Univ Tokyo Press.

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/.

Ono K, Soya T, Mimura K, 1981. Volcanoes of Japan. Geol Surv Japan Map Ser, no 11, 2nd edition, 1:2,000,000.

Volcano Types

Stratovolcano(es)
Caldera

Tectonic Setting

Subduction zone
Oceanic crust (< 15 km)

Rock Types

Major
Andesite / Basaltic Andesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
62
64
72
72,351

Affiliated Databases

Large Eruptions of Yokoate-jima 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.