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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

  • Volcano

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.

Basic Data

Volcano Number

Last Known Eruption



1969 CE

-2800 m / -9184 ft


Volcano Types

Fissure vent(s)

Rock Types

Basalt / Picro-Basalt

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)


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

Geological Summary

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.


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

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.

Eruptive History

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.

Smithsonian Sample Collections Database

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

Affiliated Sites

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).
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.