Melimoyu

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 44.08°S
  • 72.88°W

  • 2400 m
    7872 ft

  • 358052
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 9 June-15 June 2010


ODVAS-SERNAGEOMIN reported on 8 June that the Alert Level for Melimoyu was raised to Green Level 2 due to increased seismicity during May, specifically starting with nine long-period earthquakes on 27 May. The next day six long-period earthquakes preceded two separate seismic swarms. The first swarm was located 2-12 km beneath the summit. Earthquakes in the second swarm were located 7-14 km S of the summit at depths no greater than 15 km. All earthquakes were M 2.5 or less.

Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)

Index of Weekly Reports


2010: June

Weekly Reports


9 June-15 June 2010

ODVAS-SERNAGEOMIN reported on 8 June that the Alert Level for Melimoyu was raised to Green Level 2 due to increased seismicity during May, specifically starting with nine long-period earthquakes on 27 May. The next day six long-period earthquakes preceded two separate seismic swarms. The first swarm was located 2-12 km beneath the summit. Earthquakes in the second swarm were located 7-14 km S of the summit at depths no greater than 15 km. All earthquakes were M 2.5 or less.

Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)


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

Melimoyu is a stratovolcano with an 8-km-wide, largely buried caldera located about 40 km NW of the town of Puyuhuapi. The ice-filled caldera is drained by a glacier through a notch in the NE caldera rim. The basaltic-andesite volcano is elongated 10 km in an E-W direction and has several cinder cones. A 1-km-wide crater is located at the summit of the volcano. Two late-Holocene tephra layers have been documented from Melimoyu.

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

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
0200 ± 75 years Unknown Confirmed   Radiocarbon (uncorrected) MEL2 tephra
0820 BCE ± 100 years Unknown Confirmed   Radiocarbon (uncorrected) MEL1 tephra

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

Melimoto | Melimoya
The glacier-clad Melimoyu stratovolcano dominates this NASA International Space Station image (with north to the lower left). The 8-km-wide, largely buried ice-filled caldera is drained by a glacier through a notch in the NE rim. The 2400-m-high basaltic-andesite volcano is of Pleistocene to possible Holocene age and has several cinder cones.

NASA Space Station image ISS006-E-42125, 2003 (http://eol.jsc.nasa.gov/).
Glacier-clad Melimoyu is the prominent stratovolcano in this oblique NASA International Space Station image looking west toward the Corcovado Gulf. The volcano has an ice-filled 8-km-wide caldera that is drained by a glacier through a notch in the NE rim. The basaltic-andesite volcano is Pleistocene-Holocene in age.

NASA Space Station image ISS006-E-42370, 2003 (http://eol.jsc.nasa.gov/).
Glacier-clad Melimoyu volcano is seen from the NW from the town of Quellon on the island of Chiloe. The volcano lies across the Gulf of Corcovado beyond the small island cutting across the image in the foreground. Two prominent horns at the summit of the volcano rise above the rim of the summit crater. The large stratovolcano has an 8-km-wide, largely buried ice-filled caldera that is drained by a glacier through a notch in the NE caldera rim. Two late-Holocene tephra layers have been documented from Melimoyu.

Photo by Bryan Freeman, 2005.

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.

Fuenzalida R, Etchart H, 1976. Evidencias de migracion volcanica reciente desde la linea de volcanes de la Patagonia Chilena. In: Gonzalez-Ferran O (ed) {Proc Symp Andean & Antarctic Volcanology Problems (Santiago, Chile, Sept 1974)}, Rome: IAVCEI, p 392-397.

Gonzalez-Ferran O, 1995. Volcanes de Chile. Santiago: Instituto Geografico Militar, 635 p.

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

Moreno H, 1985. . (pers. comm.).

Naranjo J A, Stern C R, 2004. Holocene tephrochronology of the southernmost part (42° 30' - 45° S) of the Andean Southern Volcanic Zone. Rev Geol Chile, 31: 225-240.

Volcano Types

Stratovolcano
Caldera
Pyroclastic cone(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
0
6
211
12,944

Affiliated Databases

Large Eruptions of Melimoyu 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.