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St. Andrew Strait

Gunung api kompleks · Papua New Guinea · 270 m

The St. Andrew Strait volcano is located in the Admiralty Islands north of Papua New Guinea. The volcanic complex consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic deposits on Lou and Tuluman Islands. Volcanism is aligned along a curved arc, extending through the 12-km-long Lou Island. Tuluman Island, seen here from the SW with Lou Island 1.5 km away at the upper left, was formed during a 1953-57 eruption.
The St. Andrew Strait volcano is located in the Admiralty Islands north of Papua New Guinea. The volcanic complex consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic deposits on Lou and Tuluman Islands. Volcanism is aligned along a curved arc, extending through the 12-km-long Lou Island. Tuluman Island, seen here from the SW with Lou Island 1.5 km away at the upper left, was formed during a 1953-57 eruption. · Foto: Photo by Wally Johnson, 1964 (Australia Bureau of Mineral Resources).
Tipe
Gunung api kompleks
Negara
Papua New Guinea
Wilayah
Southwestern Pacific Volcanic Regions / Bismarck Sea Volcanic Province
Ketinggian
270 m
Koordinat
-2.380, 147.350
Letusan terakhir
1957
Kondisi tektonik
Subduction zone / Oceanic crust (< 15 km)
Bentuk lahan
Composite
Batuan utama
Rhyolite
Ringkasan geologi

The St. Andrew Strait volcano, located in the Admiralty Islands north of Papua New Guinea, consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic materials on Lou and Tuluman Islands. Volcanism is aligned on a curved arc extending through the 12-km-long Lou Island. The Tuluman Islands, 1.5 km S of Lou Island, were formed during a 1953-1957 eruption. Pam Lin and Pam Mandian Islands farther to the SE along the same arc contain fresh rhyolitic obsidian similar to that found on Tuluman.

Ringkasan Wikipedia

Ringkasan Inggris

St. Andrew Strait is a compound volcano in Papua New Guinea that has had eruptions in historical times. The volcano is not linked to any tectonic plates, the volcano is also in an area of very few earthquakes, suggesting that St. Andrew Strait is an Intraplate volcano. It consists of a group of Quaternary volcanic cones that are mainly rhyolitic in composition. The volcanism is curved, suggesting that the volcano has an ancient caldera. The centre of the volcano is Lou Island. Lou island last erupted in 240 BC and 340 AD, both eruptions came from the Bendal volcano. Lou island is the largest eruptive centre of the volcano, with 6 volcanic vents. The Pam Islands also contain fresh deposits. Historic eruptions have come from the Tuluman Islands.

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Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
240 BCE~41 BCE · 1 letusan · VEI maks. ?159~358 · 1 letusan · VEI maks. ?1754~1953 · 3 letusan · VEI maks. 2240 BCE35875713551754

Garis waktu rinci

  1. 1953VEI 2Teramati
    1953-06-27 – 1957-01-28
    Tuluman
  2. 1931VEI 0Perkiraan geologi
    1931 – Berlangsung
    Tuluman (?)
  3. 1883VEI 2Teramati
    1883-03-28 – Berlangsung
    Tuluman
  4. 350VEI ?Perkiraan geologi
    350 – Berlangsung
    Lou Island (Bedal volcano)
  5. 240 SM (±100 tahun)VEI ?Perkiraan geologi
    BCE 240 – Berlangsung
    Lou Island (Bedal volcano)

Tautan eksternal

⚠ Untuk referensi saja. Bukan untuk tanggap darurat.