Papua Nuova Guinea · Stratovulcano
Ritter
Ritter Island
- Tipo
- Stratovulcano
- Altitudine
- 75 m
- Ultima eruzione
- 2007
- Tipo
- Stratovulcano
- Paese
- Papua Nuova Guinea
- Regione
- Pacifico sud-occidentale / Bismarck Volcanic Arc
- Altitudine
- 75 m
- Coordinate
- -5.519, 148.115
- Ultima eruzione
- 2007
- Contesto tettonico
- Zona di subduzione / Crosta continentale (> 25 km)
- Forma vulcanica
- Composito
- Roccia principale
- Basalto / Picrobasalto
Sintesi geologica
Prior to 1888, Ritter Island was a steep-sided, nearly circular island about 780 m high between Umboi and Sakar Islands. Several historical explosive eruptions had been recorded prior to 1888, when large-scale slope failure destroyed the summit of the conical basaltic-andesitic volcano, leaving the arcuate 140-m-high island with a steep west-facing scarp. Devastating tsunamis were produced by the collapse and swept the coast of Papua New Guinea and offshore islands. Two minor post-collapse explosive eruptions, during 1972 and 1974, occurred offshore within the largely submarine 3.5 x 4.5 km breached depression formed by the collapse.
Sintesi da Wikipedia
Riassunto in ingleseRitter Island is a small, uninhabited, crescent-shaped volcanic island 100 kilometres (62 mi) north-east of New Guinea, in the Bismarck Sea, situated between Umboi Island and Sakar Island in the Morobe Province of Papua New Guinea (PNG) and close to New Britain island.
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Storia delle eruzioni
12 registrateGlossarioCronologia dettagliata
- 2007VEI 1Osservata2007-05-19 – 2007-05-21
- 2006VEI 1Osservata2006-10-17 – 2006-10-17
- 2002VEI 2Metodo non indicato2002-08-02 – 2002-08-02
- 1974VEI 1Osservata1974-10-17 – 1974-10-17600-900 m W of Ritter Island
- 1972VEI 1Osservata1972-10-09 – 1972-10-09West of Ritter Island
- 1888VEI 2Osservata1888-03-13 – 1888-03-13
- 1887VEI 2Metodo non indicato1887-02-02 – 1887-02-05Volcano Uncertain: Probably Ritter or Langila
- 1885VEI ?Metodo non indicato1885-01-13 – fine sconosciuta
- 1878VEI ?Metodo non indicato1878-12-31 – fine sconosciuta
- 1848VEI ?Metodo non indicato1848-04-13 – 1848-07-10
- 1793VEI 2Osservata1793-06-29 – fine sconosciuta
- 1700VEI 3Osservata1700-04-03 – 1700-04-06
Vulcani nelle vicinanze
Link esterni
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.