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Myōjin-shō

Myojinsho

칼데라 · Japan · 11m

Steam emission from the blocky summit of a lava dome formed during a submarine eruption at the Beyonesu Rocks vent of the Myojinsho caldera in 1952. This 22 September photo was taken six days after the dome began to breach the sea surface. Later that day the eruption became highly explosive and the dome was destroyed. Three cycles of dome growth and destruction occurred until October 1953.
Steam emission from the blocky summit of a lava dome formed during a submarine eruption at the Beyonesu Rocks vent of the Myojinsho caldera in 1952. This 22 September photo was taken six days after the dome began to breach the sea surface. Later that day the eruption became highly explosive and the dome was destroyed. Three cycles of dome growth and destruction occurred until October 1953. · 사진: Photo courtesy of Helen Foster, 1952 (U.S. Geological Survey). · Wikimedia Commons
화산 유형
칼데라
국가
Japan
지역
Northwestern Pacific Volcanic Regions / Izu Volcanic Arc
해발
11m
좌표
31.888, 139.918
마지막 분화
1970년
판구조 환경
Subduction zone / Oceanic crust (< 15 km)
화산 지형
Caldera
주요 암석
Dacite
지질학적 요약

Beyonesu Rocks are part of the barely exposed rim of the largely submarine Myojinsho caldera. Formation of the 8-9 km wide caldera was followed by construction of a large (2.6 km3) lava dome and/or lava flow complex on the caldera floor, originally located at a depth of 1,000-1,100 m. Most eruptions recorded since the late-19th century have occurred from the dacitic post-caldera Myojinsho lava dome on the NE caldera rim. Deposits from submarine pyroclastic flows associated with growth of the dome cover it and extend both into the NE part of the caldera and down its outer slopes. An explosive submarine eruption from Myojinsho in 1952 destroyed a Japanese research vessel, killing all 31 on board. Submarine eruptions have also been observed from other points on the caldera rim and outside of the caldera. The Beyonesu Rocks were named after the French warship the Bayonnaise, which was surveying volcanic islands south of Tokyo Bay in 1850.

Wikipedia 요약

영어 요약

Myōjin-shō (明神礁) is a submarine volcano located about 450 kilometers south of Tokyo on the Izu-Ogasawara Ridge in the Izu Islands. Volcanic activity has been detected there since 1869. Since then it has undergone more eruptions, the most powerful of which resulted in the appearance and disappearance of a small island.

Wikipedia · CC BY-SA · 전체 기사 보기 →

분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
1869~1884 · 2건 · 최고 VEI 01884~1900 · 1건 · 최고 VEI 21900~1915 · 2건 · 최고 VEI 11931~1946 · 1건 · 최고 VEI 01946~1961 · 8건 · 최고 VEI 21961~1977 · 2건 · 최고 VEI 21977~1992 · 7건 · 최고 VEI 02008~2023 · 2건 · 최고 VEI ?18691900194619772008

상세 타임라인

  1. 2023년VEI ?관측 기록
    2023-01-26 ~ 2023-01-26
  2. 2018년VEI ?관측 기록
    2018-03-24 ~ 2018-03-24
  3. 1988년VEI 0지질학적 추정
    1988-03-18 ~ 1988-03-19
    Myojinsho
  4. 1987년VEI 0지질학적 추정
    1987-10-21 ~ 1987-12-09
    Myojinsho
  5. 1986년VEI 0지질학적 추정
    1986-10-24 ~ 1986-10-24
    Myojinsho
  6. 1983년VEI 0지질학적 추정
    1983-05-12 ~ 진행 중
    Myojinsho
  7. 1982년VEI 0지질학적 추정
    1982-08-10 ~ 진행 중
    Myojinsho
  8. 1980년VEI 0지질학적 추정
    1980-11-15 ~ 1980-12-23
    Myojinsho
  9. 1979년VEI 0지질학적 추정
    1979-07-13 ~ 진행 중
    Myojinsho
  10. 1971년VEI 0지질학적 추정
    1971-03-18 ~ 진행 중
  11. 1970년VEI 2관측 기록
    1970-01-29 ~ 1970-06-16
    Myojinsho
  12. 1960년VEI 2관측 기록
    1960-07-21 ~ 진행 중
    Myojinsho
  13. 1959년VEI 0관측 기록
    1959-07-02 ~ 진행 중
  14. 1958년VEI 0관측 기록
    1958-07-02 ~ 진행 중
  15. 1957년VEI 0관측 기록
    1957-05-02 ~ 진행 중
  16. 1955년VEI 0관측 기록
    1955-06-25 ~ 진행 중
    4 km north of Bayonnaise Rocks
  17. 1954년VEI 0관측 기록
    1954-11-04 ~ 1954-11-05
    Myojinsho
  18. 1952년VEI 2관측 기록
    1952-09-16 ~ 1953-10-16
    Myojinsho
  19. 1946년VEI 2관측 기록
    1946-02-04 ~ 진행 중
    Island at 31.95 N 140.02 E
  20. 1934년VEI 0관측 기록
    1934-05 ~ 진행 중
    9 km E of Bayonnaise Rocks
  21. 1915년VEI 0관측 기록
    1915-02 ~ 1915-07
    11 km east, 19 km NE, 4 km SW
  22. 1906년VEI 1관측 기록
    1906-04-07 ~ 1906-04-14
    9-15 km SE of Bayonnaise Rocks
  23. 1896년VEI 2관측 기록
    1896 ~ 진행 중
    14 km north of Bayonnaise Rocks
  24. 1871년VEI 0지질학적 추정
    1871 ~ 진행 중
    Volcano Uncertain
  25. 1869년VEI 0지질학적 추정
    1869-05-06 ~ 진행 중
    Volcano Uncertain

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