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스미스섬

Sumisujima

칼데라 · Japan · 136m

Wave erosion has exposed the spectacular stratigraphy of Sumisujima, a steep-sided pinnacle that is a remnant of the outer southern flank of a submarine caldera 6-9 km wide. Intrusive rocks, dikes, tephra layers, and breccias are visible in this view of the eastern side of the pinnacle. Submarine eruptions have been reported from a number of locations near here, the last of which occurred in 1916. Water discoloration has been frequently observed nearby since the 1970s.
Wave erosion has exposed the spectacular stratigraphy of Sumisujima, a steep-sided pinnacle that is a remnant of the outer southern flank of a submarine caldera 6-9 km wide. Intrusive rocks, dikes, tephra layers, and breccias are visible in this view of the eastern side of the pinnacle. Submarine eruptions have been reported from a number of locations near here, the last of which occurred in 1916. Water discoloration has been frequently observed nearby since the 1970s. · 사진: Copyrighted photo by Kenichiro Tani, 2002 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/). · Wikimedia Commons
화산 유형
칼데라
국가
Japan
지역
Northwestern Pacific Volcanic Regions / Izu Volcanic Arc
해발
136m
좌표
31.440, 140.051
마지막 분화
1916년
판구조 환경
Subduction zone / Oceanic crust (< 15 km)
화산 지형
Caldera
주요 암석
Dacite
지질학적 요약

Sumisujima (also known as Smith Rocks) is a steep-sided basaltic pinnacle that forms part of the outer southern flank of a 8-9 km submarine caldera that truncates a 20-km-wide seamount. The caldera was formed between about 60,000 and 30,000 years ago. The Shirane dacitic central cone, 3 km wide and 800 m high, rises to within 8 m of the ocean surface in the eastern side of the caldera, whose 600-700 m walls and outer flanks expose basaltic, andesitic, and rhyolitic rocks. Two large submarine cones, Sumisu Knolls No. 1 and 2, lie west of the caldera. Submarine eruptions have been reported from a number of locations near Sumisujima, the last of which occurred in 1916. Water discoloration has frequently been observed since the 1970's. In October 1992 a 6-km-long zone of discolored water was seen extending from the shallow Shirane rock mass near the eastern rim of the caldera, which rises to within 7 m of the ocean surface and is the youngest feature of the volcanic complex.

Wikipedia 요약

스미스섬(일본어: 須美寿島)은 일본 이즈 제도에 속하는 섬이다. 행정구역상 도쿄도에 속하며, 한자 須美寿는 영어 Smith의 가차 표기(아테지)이다.

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분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
1672~1707 · 1건 · 최고 VEI 01848~1883 · 2건 · 최고 VEI 21883~1918 · 1건 · 최고 VEI 01954~1989 · 4건 · 최고 VEI 01989~2024 · 17건 · 최고 VEI 016721742184819181989

상세 타임라인

  1. 2024년VEI ?관측 기록
    2024-09-18 ~ 2024-10-05
  2. 2005년VEI 0지질학적 추정
    2005-03-08 ~ 2005-03-08
  3. 2003년VEI 0지질학적 추정
    2003-11-06 ~ 2003-11-06
  4. 2002년VEI 0지질학적 추정
    2002-09-04 ~ 2002-09-04
  5. 2001년VEI 0지질학적 추정
    2001-10-31 ~ 2002-02-28
  6. 2000년VEI 0지질학적 추정
    2000-10-30 ~ 2000-10-30
  7. 1998년VEI 0지질학적 추정
    1998-10-27 ~ 1999-01-13
  8. 1997년VEI 0지질학적 추정
    1997-11-21 ~ 1997-11-21
  9. 1996년VEI 0지질학적 추정
    1996-01-22 ~ 1996-01-22
  10. 1995년VEI 0지질학적 추정
    1995-07-05 ~ 1995-07-07
  11. 1994년VEI 0지질학적 추정
    1994-01-17 ~ 1994-01-17
  12. 1994년VEI 0지질학적 추정
    1994-07-27 ~ 1994-07-27
  13. 1993년VEI 0지질학적 추정
    1993-09-08 ~ 1993-09-10
  14. 1992년VEI 0지질학적 추정
    1992-08-05 ~ 1992-10-07
    Shirane (7.5 km NE of Smith Rocks)
  15. 1991년VEI 0지질학적 추정
    1991-11-05 ~ 1991-11-05
  16. 1989년VEI 0지질학적 추정
    1989-01-18 ~ 1989-01-18
  17. 1989년VEI 0지질학적 추정
    1989-07-18 ~ 1989-07-18
  18. 1977년VEI 0지질학적 추정
    1977-10-16 ~ 1977-10-16
  19. 1976년VEI 0지질학적 추정
    1976-08-16 ~ 1976-08-16
  20. 1975년VEI 0지질학적 추정
    1975-08-13 ~ 1975-09-26
  21. 1974년VEI 0지질학적 추정
    1974-07-06 ~ 1974-07-06
  22. 1916년VEI 0관측 기록
    1916-06-21 ~ 진행 중
    Just west of Smith Rock
  23. 1873년VEI 0지질학적 추정
    1873 ~ 진행 중
    31.28 N 139.92 E
  24. 1870년VEI 2관측 기록
    1870-05 ~ 진행 중
    18 km SW of Smith Rock
  25. 1672년VEI 0지질학적 추정
    1672 ~ 진행 중
    31.58 N 140.25 E

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