Malinao

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 13.416°N
  • 123.608°E

  • 1548 m
    5077 ft

  • 273801
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: August 1980 (SEAN 05:08)


Small phreatic explosion

A small phreatic explosion took place on 29 July from one of the pools of hot water in the Naglagbong thermal area, Tiwi geothermal field, at the E foot of Malinao. The explosion ejected hot mud and blocks up to 2/3 m in diameter. The ejecta reached heights of 150 m and fell as much as 350 m from the vent. One person received second-degree burns and two buildings were damaged, one a COMVOL seismic station.

Before the explosion the pool was 15 m in diameter and 4.3 m deep, with clear emerald-green water at a temperature of 85°C. As early as 6 July, the seismograph recorded unusual microseisms. Two hours before the explosion, geysering of muddy water was observed.

[The minor explosion from the Naglabong thermal area that ejected blocks in 1980 was probably due to water drawdown during development of the Tiwi geothermal field (Newhall, 1994, pers. comm.).]

Information Contacts: O. Peña, COMVOL, Quezon City.

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

Index of Bulletin Reports


Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

04/1970 (CSLP 35-70) Reports of tremors and rumblings

08/1980 (SEAN 05:08) Small phreatic explosion




Bulletin Reports

All information contained in these reports is preliminary and subject to change.


04/1970 (CSLP 35-70) Reports of tremors and rumblings

Card 0919 (27 April 1970) Reports of tremors and rumblings

Father Hennessey reports by cable that there is a 'report (that) Mount Malinao, an extinct volcano 20 km NNW of Mayon, is becoming active.' Earth tremors 'ranging from Intensity 1 to 5' have occurred and 'deep rumblings' have been heard.

W. Ward cabled the following: 'Mount Malinao acting up, no eruption since prehistoric times.'

Malinao is located in southeastern Luzon. It is a stratovolcano with crescentic center of which the northern wall is failing. The inner crater walls are bare. There are two hot wells, Jigabo and Naglabong. At the latter well, the fumaroles had a highest temperature of 108°C in 1903.

Information Contacts: Rev. J.J. Hennessey, Manila Observatory, Manila, Philippines; W.T.T. Ward, U.S. 13th Air Force Historical Office, Clark Air Force Base, Manila, Philippines.

08/1980 (SEAN 05:08) Small phreatic explosion

A small phreatic explosion took place on 29 July from one of the pools of hot water in the Naglagbong thermal area, Tiwi geothermal field, at the E foot of Malinao. The explosion ejected hot mud and blocks up to 2/3 m in diameter. The ejecta reached heights of 150 m and fell as much as 350 m from the vent. One person received second-degree burns and two buildings were damaged, one a COMVOL seismic station.

Before the explosion the pool was 15 m in diameter and 4.3 m deep, with clear emerald-green water at a temperature of 85°C. As early as 6 July, the seismograph recorded unusual microseisms. Two hours before the explosion, geysering of muddy water was observed.

[The minor explosion from the Naglabong thermal area that ejected blocks in 1980 was probably due to water drawdown during development of the Tiwi geothermal field (Newhall, 1994, pers. comm.).]

Information Contacts: O. Peña, COMVOL, Quezon City.

Forested Malinao stratovolcano, NNW of Mayon volcano, contains a large summit crater that is breached to the east. This Quaternary volcano, also known as Buhi or Takit, was active from about 500,000 to 60,000 years ago (Nielson et al., 1996), but the eastern flank of the 1548-m-high volcano is the site of the Luzon's largest solfataras and hot springs, some of which deposit silicious sinter. A minor explosion from the Naglabong thermal area that ejected blocks in 1980 was probably due to water drawdown during development of the Tiwi geothermal field (Newhall 1994, pers. comm.).

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

Buhi | Takit

Thermal

Feature Name Feature Type Elevation Latitude Longitude
Jigabo Thermal
Naglagbong
    Naglegbeng
Thermal
Tiwi Thermal 13° 28' 0" N 123° 39' 0" E
Mount Malinao is a forested stratovolcano with a summit crater that is breached to the east. The Tiwi geothermal field, seen here with the volcano in the background, is located on the east flanks of Malinao. The geothermal field is located near Luzon's largest fumarole field, which includes siliceous sinter deposits at Naglabong.

Photo by Chris Newhall (U.S. Geological Survey).

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.

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.

Newhall C G, 1994. . (pers. comm.).

Nielson D L, Clemente W C, Moore J N, Powell T S, 1996. Fracture permiability in the Matalibong-25 corehole, Tiwi geothermal field, Philippines. Proc 21st Workshop Geotherm Reservoir Eng, Stanford Univ, Calif, Jan 22-24, 1996, p 209-216.

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

Volcano Types

Stratovolcano

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Affiliated Databases

Large Eruptions of Malinao 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.