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Long Island

Volcán complejo · Papua New Guinea · 1263 m

The broad profile of Long Island, seen here from the E, is composed of two steep-sided edifices, Mount Reaumur to the north (center) and Cerisy Peak to the south. Collapse of the volcanic complex during at least three major explosive eruptions about 16,000, 4,000, and 300 years ago produced a large 10 x 12.5 km caldera, whose low rim appears at the right.
The broad profile of Long Island, seen here from the E, is composed of two steep-sided edifices, Mount Reaumur to the north (center) and Cerisy Peak to the south. Collapse of the volcanic complex during at least three major explosive eruptions about 16,000, 4,000, and 300 years ago produced a large 10 x 12.5 km caldera, whose low rim appears at the right. · Foto: Photo by Russel Blong, 1976 (Macquarie University). · Wikimedia Commons
Tipo
Volcán complejo
País
Papua New Guinea
Región
Southwestern Pacific Volcanic Regions / Bismarck Volcanic Arc
Altitud
1263 m
Coordenadas
-5.314, 147.105
Última erupción
1993
Contexto tectónico
Subduction zone / Continental crust (> 25 km)
Forma volcánica
Composite
Roca principal
Andesite / Basaltic Andesite
Resumen geológico

The broad profile of Long Island is dominated by two steep-sided stratovolcanoes, Mount Reaumur in the north and Cerisy Peak in the south. Collapse of the basaltic-andesitic volcanic complex produced a large 10 x 12.5 km caldera, now filled by Lake Wisdom. Caldera formation occurred during at least three major explosive eruptions, about 16,000, 4,000, and 300 years ago. The most recent deposited andesitic tephra across the New Guinea Highlands, prompting legends of a "Time of Darkness." Post-caldera eruptions have constructed a small cone, Motmot Island, in the south-central part of Lake Wisdom. Moderate explosive eruptions have occurred during the 20th century from vents at and near Motmot Island.

Resumen de Wikipedia

Resumen en inglés

Long Island is a populated volcanic island in Madang Province, Papua New Guinea. It is located north of the island of New Guinea, separated from it by the Vitiaz Strait. The island's interior contains a 360 m-deep (1,180 ft) freshwater volcanic crater lake and within that lake exists an even smaller island known as Motmot island. During the late 17th or early 18th century virtually all of the biota on the island was destroyed and has subsequently provided scientists a unique opportunity to study recolonization efforts by plants, animals, and humans. The vast majority of the buildings on the island are constructed using vernacular architecture.

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Historial de erupciones

Resumen (VEI en el tiempo)
Haga clic en una barra para ver erupciones individuales
2040 BCE~1848 BCE · 1 erupciones · VEI máx. 61609~1801 · 1 erupciones · VEI máx. 61801~1993 · 10 erupciones · VEI máx. 32040 BCE1080 BCE120 BCE8411801

Línea de tiempo detallada

  1. 1993VEI 1Observado
    1993-11-03 – 1993-11-25
    E-W fissure NNE of Motmot Island
  2. 1976VEI 1Observado
    1976-01-02 – En curso
    Motmot
  3. 1973VEI 2Observado
    1973-04-16 – 1974-02-28
    Motmot
  4. 1968VEI 2Observado
    1968-03-16 – 1968-06-12
    Motmot
  5. 1961VEI ?Estimación geológica
    1961-07-02 – En curso
    Motmot
  6. 1955VEI 3Observado
    1955-06-05 – 1955-06-13
    Motmot
  7. 1953VEI 3Observado
    1953-05-08 – 1954-01-07
    Motmot
  8. 1943VEI ?Observado
    1943 – En curso
    Motmot
  9. 1938VEI ?Observado
    1938 – En curso
    Lake Wisdom
  10. 1933VEI ?Observado
    1933 – En curso
    Lake Wisdom
  11. 1660 (±20 años)VEI 6Estimación geológica
    1660 – En curso
  12. 2040 a. C. (±110 años)VEI 6Estimación geológica
    BCE 2040 – En curso

Enlaces externos

⚠ Solo como referencia. No apto para respuesta ante emergencias.