Papúa Nueva Guinea · Volcán complejo
Long Island
- Tipo
- Volcán complejo
- Altitud
- 1263 m
- Última erupción
- 1993
- Tipo
- Volcán complejo
- País
- Papúa Nueva Guinea
- Región
- Pacífico Suroccidental / Bismarck Volcanic Arc
- Altitud
- 1263 m
- Coordenadas
- -5.314, 147.105
- Última erupción
- 1993
- Contexto tectónico
- Zona de subducción / Corteza continental (> 25 km)
- Forma volcánica
- Compuesto
- Roca principal
- Andesita / Andesita basáltica
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 inglésLong 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
12 registradasGlosarioLínea de tiempo detallada
- 1993VEI 1Observado1993-11-03 – 1993-11-25E-W fissure NNE of Motmot Island
- 1976VEI 1Observado1976-01-02 – fin desconocidoMotmot
- 1973VEI 2Observado1973-04-16 – 1974-02-28Motmot
- 1968VEI 2Observado1968-03-16 – 1968-06-12Motmot
- 1961VEI ?Método no indicado1961-07-02 – fin desconocidoMotmot
- 1955VEI 3Observado1955-06-05 – 1955-06-13Motmot
- 1953VEI 3Observado1953-05-08 – 1954-01-07Motmot
- 1943VEI ?Observado1943-07-02 – fin desconocidoMotmot
- 1938VEI ?Observado1938-07-02 – fin desconocidoLake Wisdom
- 1933VEI ?Observado1933-07-02 – fin desconocidoLake Wisdom
- 1660 (±20 años)VEI 6Estimación geológica1660 – fin desconocido
- 2040 a. C. (±110 años)VEI 6Estimación geológica2040 a. C. – fin desconocido
Volcanes cercanos
Enlaces externos
⚠ Solo como referencia. No apto para respuesta ante emergencias.