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CoAxial Segment

열극 분화구 · Undersea Features · 2400m (해저)

During a 1993 ROPOS ROV (Remotely Operated Vehicle) dive on the CoAxial Segment along the Juan de Fuca Ridge a new lava flow was discovered on the sea floor. It was still hot and venting warm water (up to 50°C), and was 2.5 km long and 300 m wide. Bright yellow sediment patches indicated the presence of iron-reducing bacteria in the vent fluids. The CoAxial segment is located about 435 km W of the Oregon coast, NE of Axial volcano.
During a 1993 ROPOS ROV (Remotely Operated Vehicle) dive on the CoAxial Segment along the Juan de Fuca Ridge a new lava flow was discovered on the sea floor. It was still hot and venting warm water (up to 50°C), and was 2.5 km long and 300 m wide. Bright yellow sediment patches indicated the presence of iron-reducing bacteria in the vent fluids. The CoAxial segment is located about 435 km W of the Oregon coast, NE of Axial volcano. · 사진: Image courtesy of National Oceanic and Atmospheric Administration (http://www.pmel.noaa.gov/vents/home.html).
화산 유형
열극 분화구
국가
Undersea Features
지역
Eastern Pacific Volcanic Regions / Northeast Pacific Rifts Volcanic Province
해발
2400m (해저)
좌표
46.520, -129.580
마지막 분화
1993년
판구조 환경
Rift zone / Oceanic crust (< 15 km)
화산 지형
Cluster
주요 암석
Basalt / Picro-Basalt
지질학적 요약

The CoAxial segment of the Juan de Fuca Ridge is about 435 km W of the Oregon coast, NE of Axial volcano. A submarine eruption along the CoAxial segment that produced thermal plumes and a new lava flow was detected by acoustic hydrophones in June 1993, just days after installation of the hydrophone system. This was the first deep-sea volcanic eruption detected as it was happening. The location of the eruption was at a depth of about 2,400 m, about 37 km NE of Axial volcano. Bathymetric surveys indicated that one or more additional sea-floor lava extrusions took place immediately east of the 1993 lava flow sometime between 1981-82 and 1991.

분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
1986~1987 · 1건 · 최고 VEI 01992~1993 · 1건 · 최고 VEI 019861987199019911992

상세 타임라인

  1. 1993년VEI 0관측 기록
    1993-06-26 ~ 1993-07-04
    N end CoAxial segment, Juan de Fuca Ridge
  2. 1986년 (±5년)VEI 0관측 기록
    1986-07-02 ~ 진행 중
    CoAxial segment, Juan de Fuca Ridge

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