Unnamed submarine volcano
Tofua Arc at 18.3°S
성층화산 · Tonga · 40m (해저)
- 화산 유형
- 성층화산
- 국가
- Tonga
- 지역
- Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
- 해발
- 40m (해저)
- 좌표
- -18.325, -174.365
- 마지막 분화
- 2019년
- 판구조 환경
- Subduction zone / Oceanic crust (< 15 km)
- 화산 지형
- Composite
- 주요 암석
- Dacite
지질학적 요약
A submarine volcano along the Tofua Volcanic Arc ~45 km NW of Vava'u Island was first observed in September 2001, ~35 km S of Fonualei and 60 km NE of Late volcano. The site of the eruption is at a bathymetric depth of ~300 m. T-phase waves were recorded on 27-28 September 2001, and on the 27th local fishermen observed an ash-rich eruption column that rose above the ocean surface. No eruptive activity was reported after the 28th, but water discoloration was documented the following month. In early November rafts and strandings of dacitic pumice were reported along the coasts of Kadavu and Viti Levu in Fiji. The depth of the summit of the submarine cone following the eruption was determined to be 40 m during a 2007 survey; the crater of the 2001 eruption was open to the E.
분화 이력
상세 타임라인
- 2019년VEI 3관측 기록2019-08-06 ~ 2019-08-08
- 2001년VEI 2관측 기록2001-09-27 ~ 2001-09-28
외부 링크
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