Unnamed

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 9.83°N
  • 104.3°W

  • -2500 m
    -8200 ft

  • 334050
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

There are no activity reports for Unnamed.



 Available Weekly Reports

There are no Weekly Reports available for Unnamed.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
2005 Aug (?) 2006 Jan (?) Confirmed 0 Historical Observations East Pacific Rise (9.8 deg N)
1991 Dec 1 ± 30 days 1992 Feb 4 ± 30 days Confirmed 0 Historical Observations East Pacific Rise (9.9 deg N)
1991 Mar (?) Unknown Confirmed 0 Historical Observations East Pacific Rise (9.8 deg N)
1988 ± 1 years Unknown Confirmed 0 Historical Observations East Pacific Rise (9.3 deg N)
1950 (?) Unknown Confirmed 0 Magnetism East Pacific Rise (9.9 deg N)
1875 (in or before) Unknown Confirmed 0 Magnetism East Pacific Rise (9.9 deg N)
1650 ± 100 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.8 deg N)
1600 ± 150 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.9 deg N)
1200 ± 300 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.8 deg N)
0950 ± 2000 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.5 deg N)
0850 ± 200 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.9 deg N)
0050 BCE ± 2000 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.5 deg N)
1050 BCE ± 2000 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.5 deg N)
2050 BCE ± 1000 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.5 deg N)
3050 BCE ± 2000 years Unknown Confirmed 0 Uranium-series EPR axis and East of axis
4050 BCE ± 2000 years Unknown Confirmed 0 Uranium-series East Pacific Rise (9.5 deg N)
5050 BCE ± 8000 years Unknown Confirmed 0 Uranium-series EPR axis and East and West of axis

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. 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. Additional discussion of data sources can be found under Volcano Data Criteria.

Bowles J, Gee J S, Kent D V, Perfit M R, Soule S A, Fornari D J, 2006. Paleointensity applications to timing and extent of eruptive activity, 9°-10° N East Pacific Rise. Geochem Geophys Geosyst, 7: Q06006, doi:10.1029/2005GC001141.

Fornari D J, Haymon R M, Perfit M R, Gregg T K P, Edwards M H, 1998. Axial summit trough of the East Pacific Rise 9°-10° N: geological characteristics and evolution of the axial zone on fast spreading mid-ocean ridges. J Geophys Res, 103: 9827-9855.

Goldstein S J, Perfit M R, Batiza R, Fornari D J, Murrell M T, 1994. Off-axis volcanism at the East Pacific Rise detected by uranium-series dating of basalts. Nature, 367: 157-159.

Gregg T K P, Fornari D J, Perfit M R, Haymon R M, Fink J H, 1996. Rapid emplacement of a mid-ocean ridge lava flow on the East Pacific Rise at 9° 46'-51' N. Earth Planet Sci Lett, 144: E1-E7.

Haymon R M, Fornari D J, Edwards M H, Carbotte S, Wright D, Macdonald K C, 1991. Hydrothermal vent distribution along the East Pacific Rise crest (9° 9'-54' N) and its relationship to magmatic and tectonic processes on fast-spreading mid-ocean ridges. Earth Planet Sci Lett, 104: 513-534.

Haymon R M, Fornari D J, Von Damm K L, Lilley M D, Perfit M R, Edmond J M, Shanks WC III, Lutz R A, Grebmeir J M, Carbotte S, Wright D, McLaughlin E, Smith M, Beedle N, Olson E, 1993. Volcanic eruption of the mid-ocean ridge along the East Pacific Rise crest at 9°45-52' N: direct submersible observations of seafloor phenomena associated with an eruption event in April 1991. Earth Planet Sci Lett, 119: 85-101.

Perfit M R, Chadwick W W Jr, 1998. Magmatism at Mid-Ocean ridges: constraints from volcanological and geochemical investigations. In: Buck W R, Delaney P T, Karson J A, Lagabrielle Y (eds) Faulting and Magmatism at Mid-Ocean Ridges {Amer Geophys Union Geophys Monograph} 106: 59-115.

Rubin K H, Macdougall J D, Perfit M R, 1994. 210Po-210Pb dating of recent volcanic eruptions on the sea floor. Nature, 368: 841-844.

Sims K W W, Blichet-Toft J, Fornari D J, Perfit M R, Goldstein S J, Johnson P, DePaolo D J, Hart S R, Murrell M T, Michael P J, Layne G D, Ball L A, 2003. Aberrant youth: chemical and isotopic constraints on the origin of off-axis lavas from the East Pacific Rise, 9°-10° N. Geochem Geophys Geosyst, 4: 8621, doi:10.1029/2002G000443.

Smithsonian Institution-GVN, 1990-. [Monthly event reports]. Bull Global Volc Network, v 15-33.

Tolstoy M, Cowen J P, Baker E T, Fornari D J, Rubin K H, Shank T M, Waldhauser F, Bohnenstiehl D R, Forsyth D W, Homes R C, Love B, Perfit M R, Weekly R T, Glazer B, 2006. A sea-floor spreading event captured by seismometers. Science, 314: 1920-1922.

Evidence for a very recent, possibly ongoing eruption was detected during a series of dives in the submersible vessel Alvin in 1991 on the East Pacific Rise at about 9 deg 50 min N. Hot-vent animal communities that had been documented during November to December 1989 imaging were observed to have been buried by fresh basaltic lava flows, and the scorched soft tissues of partially buried biota had not yet attracted bottom scavengers. Fresh black smoker chimneys were draped by new lava flows. This position was at a depth of about 2500 m south of the Clipperton fracture zone, about 1000 km SW of Acapulco, México. It coincided with a location where fresh lava flows previously estimated as less than roughly 50 years in age had been found. Later dating of very short half-life radionuclides from dredged samples confirmed the young age of the eruption and indicated that another eruptive event had taken place in late 1991 and early 1992. An eruption in 2005-2006 produced lava flows that entrapped previously emplaced seismometers.