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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 10.77°N
  • 123.23°E

  • 1510 m
    4953 ft

  • 272040
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Silay.

The Global Volcanism Program has no Weekly Reports available for Silay.

The Global Volcanism Program has no Bulletin Reports available for Silay.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Unrest / Holocene

1510 m / 4953 ft


Volcano Types


Rock Types

Andesite / Basaltic Andesite

Tectonic Setting

Subduction zone
Continental crust (> 25 km)


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

Geological Summary

Silay, the northernmost volcano on Negros Island, lies 28 km east of Silay City. The compound basaltic-andesite stratovolcano has a summit elevation of 1510 m and contains a partially breached, 3.5-km-wide caldera. Silay was considered to be of Holocene age (IAVCEI, 1973), but the age of its most recent eruptions is not known. The Malisbog solfatara field displays fumarolic activity and extensive sulfur deposits.


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

COMVOL, 1981. Catalogue of Philippine volcanoes and solfataric areas. Philippine Comm Volc, 87 p.

Del Mundo E T, Arpa M C, 2007. (pers. comm.).

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.

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.

The Global Volcanism Program is not aware of any Holocene eruptions from Silay. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Silay 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.


Feature Name Feature Type Elevation Latitude Longitude
Malisbog Thermal

Photo Gallery

Cloud banks drape the eastern flanks of Silay (right center), the northernmost volcano on Negros Island. The compound andesitic stratovolcano contains the Malisbog solfatara field, which displays fumarolic activity and extensive sulfur deposits. Mandalagan volcano is visible at the bottom center of this Landsat image. The city of Bacolod lies along the western coast of the island at the lower left.

NASA Landsat image, 2003 (courtesy of Hawaii Synergy Project, Univ. of Hawaii Institute of Geophysics & Planetology).

Smithsonian Sample Collections Database

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

Affiliated Sites

Large Eruptions of Silay 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.