Santa Isabel

Photo of this volcano
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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 3.58°N
  • 8.75°E

  • 3007 m
    9863 ft

  • 224004
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Santa Isabel.

The Global Volcanism Program has no Weekly Reports available for Santa Isabel.

The Global Volcanism Program has no Bulletin Reports available for Santa Isabel.

Santa Isabel is the largest and highest of three coalescing basaltic shield volcanoes forming Bioko (Fernando Poo) Island. Lying on the continental shelf along the Cameroon Line, Santa Isabel is modified by the same NNE faults as Mt. Cameroon across the Gulf of Guinea on the African mainland. The 3007-m-high volcano contains numerous satellitic cinder cones. Santa Isabel is the only Bioko Island volcano with reported historical eruptions, although they are poorly documented. Three eruptions, during the late-19th and early-20th centuries, have been reported form SE flank vents.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1923 Unknown Confirmed   Historical Observations SE flank
1903 Unknown Confirmed   Historical Observations SE flank, near Bahu
1898 (?) Unknown Confirmed   Historical Observations SE flank

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.



Synonyms
Basile, Pico de
Santa Isabel volcano occupies the northern end of Bioko (Fernando Poo) Island in this NASA Landsat view with north to the upper left. A large escarpment cuts the northern side of the 3007-m-high volcano, whose summit is cut by regional NE-SW-trending faults. Numerous satellitic cinder cones are present, many of which lie along the same tectonic trend. Santa Isabel is the only Bioko Island volcano with reported historical eruptions, although they are poorly documented. The brown area along the northern coast is the capital city of Malabo.

NASA Landsat image, 1999 (courtesy of Hawaii Synergy Project, Univ. of Hawaii Institute of Geophysics & Planetology).

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.

Deruelle B, Kambou R, Joron J-L, 1990. New petrological data on volcanic rocks of Bioko Island (Equatorial Guinea). IAVCEI 1990 Internatl Volc Cong, Mainz, Abs, (unpaginated).

Fitton J G, 1987. The Cameroon line, West Africa: a comparison between oceanic and continental alkaline volcanism. In: Fitton J G and Upton B G J (eds) {Alkaline Igneous Rocks}, Geol Soc Amer Spec Pub 30: 273-291.

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

Liniger-Goumaz M, 1988. Historical Dictionary of Equatorial Guinea. Metuchen, New Jersey: Scarecrow Press, African Historical Dictionaries, no 21.

Vincent P M, 1992. . (pers. comm.).

Volcano Types

Shield
Cinder cone(s)

Tectonic Setting

Intraplate
Continental crust (> 25 km)

Rock Types

Major
Basalt / Picro-Basalt
Trachybasalt / Tephrite Basanite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
95,977
95,977
117,500
506,900

Affiliated Databases

Large Eruptions of Santa Isabel 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.