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

  • Volcano

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.

Basic Data

Volcano Number

Last Known Eruption



1923 CE

3007 m / 9863 ft


Volcano Types

Pyroclastic cone(s)

Rock Types

Basalt / Picro-Basalt
Trachybasalt / Tephrite Basanite

Tectonic Setting

Continental crust (> 25 km)


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

Geological Summary

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.


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

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.).

Eruptive History

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.


Basile, Pico de

Photo Gallery

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).

Smithsonian Sample Collections Database

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

Affiliated Sites

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).
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.