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Curacoa volcano

Curacoa

복합화산 · Tonga · 33m (해저)

A raft of floating pumice from a July 1973 submarine eruption behind the wake of a ship. This was the first report of an eruption from the Curacoa submarine volcano in the northern Tonga Islands. The pumice raft covered an area of more than 100 km2 and was encountered by a ship 200 km to the W nearly two weeks after the start of the eruption. Another eruption was observed in the same general area in 1979.
A raft of floating pumice from a July 1973 submarine eruption behind the wake of a ship. This was the first report of an eruption from the Curacoa submarine volcano in the northern Tonga Islands. The pumice raft covered an area of more than 100 km2 and was encountered by a ship 200 km to the W nearly two weeks after the start of the eruption. Another eruption was observed in the same general area in 1979. · 사진: Photo by the crew of the vessel "Port Nicholson," 1973 (courtesy of Tom Simkin, Smithsonian Institution).
화산 유형
복합화산
국가
Tonga
지역
Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
해발
33m (해저)
좌표
-15.620, -173.670
마지막 분화
1979년
판구조 환경
Subduction zone / Oceanic crust (< 15 km)
화산 지형
Composite
주요 암석
Dacite
지질학적 요약

A submarine volcano south of Curacoa Reef at the northern end of the Tofua volcanic arc was first observed in eruption in 1973. Explosive eruptions, which produced large rafts of dacitic pumice, covering an area of more than 100 km2, were observed from the island of Tafahi, 27 km SSW. The eruption site was located about 6.5 km SW of Curacoa Reef. Multiple submarine vents are apparently located in this area; a second eruption was reported in 1979 from a location 13 km N of Tafahi.

Wikipedia 요약

영어 요약

Curacoa is a submarine volcano located south of the Curacoa Reef in northern Tonga. The reef is 24km North of Tafahi in the Niua Islands. Eruptions were observed in 1973 and 1979 from two separate vents. The 1973 eruption produced a large raft of dacitic pumice, and had a volcanic explosivity index (VEI) of 3.

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분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
1973~1974 · 1건 · 최고 VEI 31978~1979 · 1건 · 최고 VEI 119731974197619771978

상세 타임라인

  1. 1979년VEI 1관측 기록
    1979-05-14 ~ 진행 중
    13 km north of Tafahi
  2. 1973년VEI 3관측 기록
    1973-07-11 ~ 1973-07-16
    6.4 km SW of Curacoa Reef

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