Unnamed

No photo available for this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 8.27°S
  • 107.95°W

  • -2800 m
    -9184 ft

  • 334100
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Unnamed.

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

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

A massive 15 +/- 4 cu km lava flow field covers about 220 sq km of the East Pacific Rise (EPR) axis crest at about 8 degrees South. The high reflectivity of the lava flow indicates a very youthful age. This, coupled with teleseismically recorded earthquakes in 1964, 1965, and 1969 of an unusual magnitude along this segment of the EPR and the detection of a helium megaplume of a volume consistent with the eruption of a lava flow of this volume detected several years later at a distant location consistent with inferred circulation patterns at mid-ocean depths led Macdonald et al. (1989) to suggest that part or all of this lava field may have been emplaced in the past 25 years, during one or more eruptions coincident with the earthquakes and onset of the helium plume.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1964 (?) 1969 (?) Confirmed 0 Historical Observations East Pacific Rise (8.3 deg S)

The Global Volcanism Program has no synonyms or subfeatures listed for Unnamed.

The Global Volcanism Program has no photographs available for Unnamed.

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.

Macdonald K C, Haymon R, Shor A, 1989. A 220 km2 recently erupted lava field on the East Pacific Rise near lat 8° S. Geology, 17: 212-216.

Volcano Types

Submarine
Fissure vent(s)

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)

Rock Types

Major
Basalt / Picro-Basalt

Population

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

Affiliated Databases

Large Eruptions of Unnamed 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.