Tofua Arc at 20.9°S

성층화산 · Tonga · 296m (해저)

A plume and discolored water from a submarine eruption were observed in January 1999. This unnamed submarine volcano, 35 km NW of the Niu Aunofo lighthouse on Tongatapu Island, was constructed at the southern end of a submarine ridge segment of the Tofua volcanic arc extending NNE to Falcon Island. The first documented eruptions took place in 1911 and 1923. An ephemeral island was formed during this eruption in 1999; prior to this the summit was 13 m beneath the sea surface. · 사진: Photo by B. Hutchins, 1999 (published in Taylor, 1999).

화산 유형: 성층화산
국가: Tonga
지역: Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
해발: 296m (해저)
좌표: -20.852, -175.550
마지막 분화: 2017년
판구조 환경: Subduction zone / Oceanic crust (< 15 km)
화산 지형: Composite
주요 암석: No Data (checked)

지질학적 요약

An unnamed submarine volcano is located along the Tofua Volcanic Arc 35 km NW of the Niu Aunofo lighthouse on Tongatapu Island. The first documented eruptions took place in 1911 and 1923; an ephemeral island was formed in 1999. A submarine eruption in January 2017 produced discolored water visible in satellite imagery.

분화 이력

요약 (VEI 시계열)

막대를 클릭하면 개별 분화가 표시됩니다

상세 타임라인

2017년VEI 0관측 기록
2017-01-23 ~ 2017-01-31
Submarine
1999년VEI 1관측 기록
1999-01-08 ~ 1999-01-14
1970년VEI 0관측 기록
1970-01-03 ~ 1970-01-03
1923년VEI 0관측 기록
1923-07-01 ~ 진행 중
1911년VEI 0관측 기록
1911-08 ~ 진행 중

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