Cuernos de Negros

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 9.25°N
  • 123.17°E

  • 1862 m
    6107 ft

  • 272010
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Cuernos de Negros.

The Global Volcanism Program has no Weekly Reports available for Cuernos de Negros.

The Global Volcanism Program has no Bulletin Reports available for Cuernos de Negros.

Cuernos de Negros (also known as Magaso) is a large stratovolcano complex that anchors the SE tip of Negros Island. The eastern side of the complex consists of two stratovolcanoes and a lava dome; two crater lakes up to 1.5 km in diameter are present. The lower western part of the complex contains four volcanic centers. The small summit crater of Magaso, the highest peak of the complex, rises above the city of Dumaguete and contains fumaroles. Two Sulfuric springs are found on the ESE flank of Magaso, and hot springs occur on the NE flank. The youngest radiocarbon date obtained was 14,000 yrs BP from a dacitic breccia, and a younger andesitic unit is present. An increase in fumarolic activity took place after a major tectonic earthquake in 1902. The Palinpinon geothermal field is located south of the Okoy River on the north side of the volcano.

The Global Volcanism Program is not aware of any Holocene eruptions from Cuernos de Negros. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Cuernos de Negros page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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
Magaso | Magasu


Cones
Feature Name Feature Type Elevation Latitude Longitude
Guinsayawan, Mount Cone 1781 m 9° 20' 0" N 123° 5' 0" E
Talines, Mount Cone 1512 m 9° 10' 0" N 123° 7' 0" E


Domes
Feature Name Feature Type Elevation Latitude Longitude
Guintabon Dome Dome 1216 m 9° 22' 0" N 123° 8' 0" E


Thermal
Feature Name Feature Type Elevation Latitude Longitude
Palinpinon Thermal 9° 18' 0" N 123° 9' 0" E
Magaso, also known as Cuernos de Negros, is a large stratovolcano that anchors the SE tip of Negros Island. The volcano is located just right of center in the cloud-covered portion of SE Negros Island in this Space Shuttle image (with north to the upper right), directly across the channel and in line with the SW tip of Cebu Island at the right side of the image. No historical eruptions are known from Magaso, but the summit crater is fumarolically active, and the Palinpinon geothermal field are located at its base.

NASA Space Shuttle image STS61-40-74, 1985 (http://eol.jsc.nasa.gov/).
The broad Cuernos de Negros volcanic complex is seen from the small island of Apo, 7km SE of the city of Zamboanguita at the southern end of Negros Island. The eastern side of the complex consists of two stratovolcanoes and a lava dome; two crater lakes up to 1.5 km in diameter are present. The small summit crater of Magaso, the highest peak of the complex, rises above the city of Dumaguete and contains fumaroles. The Palinpinon geothermal field is located on the north side of the volcano.

Photo by Arne Kuilman, 2007.

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.

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

Neumann van Padang M, 1953. Philippine Islands and Cochin China. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 2: 1-49.

PHIVOLCS, 2004-. Volcanoes. http://www.phivolcs.dost.gov.ph/Volcanolist/.

Rae A J, Cooke D R, Phillips D, Zaide-Delfin M, 2004. The nature of magmatism at Palinpinon geothermal field, Negros Island, Philippines: implications for geothermal activity and regional tectonics. J Volc Geotherm Res: 129: 321-342.

Solidum R U, Castillo P R, Hawkins J W, 2003. Geochemistry of lavas from Negros Arc, west central Philippines: insights into the contribution from the subducting slab. Geochem Geophys Geosyst, 4: doi:10.1029/2003GC00513.

von Biedersee H, Pichler H, 1995. The Canlaon and its neighbouring volcanoes in the Negros Belt/Philippines. J Southeast Asian Earth Sci, 11: 111-123.

Volcano Types

Complex
Stratovolcano(es)
Lava dome(s)

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Andesite / Basaltic Andesite
Dacite
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
1,458
39,681
531,644
2,960,980

Affiliated Databases

Large Eruptions of Cuernos de Negros 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.