본문으로 건너뛰기
← 지도로 돌아가기
⇄ 비교

Bogoslof Island

Bogoslof

성층화산 · United States · 150m

Bogoslof is the summit of a largely submarine volcano located in the Bering Sea, 50 km behind the main Aleutian arc. The island is about 1.5 x 0.6 km wide and due to its frequent eruptive activity and energetic wave action, has changed shape dramatically since it was first mapped in the late 1700s. The rounded lava dome and offshore spire at the northern tip of the island (bottom-center) formed in 1992. The circular, flat area at the right is a remnant of the 1927 lava dome, and the steep pinnacle is Castle Rock, a 1796 dome remnant.
Bogoslof is the summit of a largely submarine volcano located in the Bering Sea, 50 km behind the main Aleutian arc. The island is about 1.5 x 0.6 km wide and due to its frequent eruptive activity and energetic wave action, has changed shape dramatically since it was first mapped in the late 1700s. The rounded lava dome and offshore spire at the northern tip of the island (bottom-center) formed in 1992. The circular, flat area at the right is a remnant of the 1927 lava dome, and the steep pinnacle is Castle Rock, a 1796 dome remnant. · 사진: Photo by Terry Keith, 1994 (Alaska Volcano Observatory, U.S. Geological Survey). · Wikimedia Commons
화산 유형
성층화산
국가
United States
지역
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
해발
150m
좌표
53.930, -168.030
마지막 분화
2017년
판구조 환경
Subduction zone / Intermediate crust (15-25 km)
화산 지형
Composite
주요 암석
Trachyandesite / Basaltic Trachyandesite
지질학적 요약

Bogoslof is the emergent summit of a submarine volcano that lies 40 km N of the main Aleutian arc. It rises 1,500 m above the Bering Sea floor. Repeated construction and destruction of lava domes at different locations during historical time has greatly modified the appearance of this "Jack-in-the-Box" volcano and has introduced a confusing nomenclature applied during frequent visits by exploring expeditions. The present triangular-shaped, 0.75 x 2 km island consists of remnants of lava domes emplaced from 1796 to 1992. Castle Rock (Old Bogoslof) is a steep-sided pinnacle that is a remnant of a spine from the 1796 eruption. The small Fire Island (New Bogoslof), about 600 m NW of Bogoslof Island, is a remnant of a lava dome formed in 1883.

Wikipedia 요약

영어 요약

Bogoslof Island or Agasagook Island is the summit of a submarine stratovolcano at the south edge of the Bering Sea, 35 miles (56 km) northwest of Unalaska Island of the Aleutian Islands chain. It has a land area of 319.3 acres (1.292 km2) and is uninhabited. It is 1,040 meters (3,410 ft) long and 1,512 m (4,961 ft) wide, with a peak elevation of 490 feet (150 m). The stratovolcano rises about 6,000 ft (1,800 m) from the seabed, but the summit is the only part that projects above sea level. The island is believed to be relatively new, with the volcano being entirely below sea level before 1796, and most of the presently 300-acre island being formed by eruptions since 1900.

Wikipedia · CC BY-SA · 전체 기사 보기 →

분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
1796~1818 · 2건 · 최고 VEI 31862~1884 · 1건 · 최고 VEI 31906~1928 · 5건 · 최고 VEI 31928~1950 · 1건 · 최고 VEI 11950~1972 · 1건 · 최고 VEI 01972~1994 · 1건 · 최고 VEI 31994~2016 · 1건 · 최고 VEI 317961840190619501994

상세 타임라인

  1. 2016년VEI 3관측 기록
    2016-12-20 ~ 2017-08-30
    Central vent, just below sea level
  2. 1992년VEI 3관측 기록
    1992-07-06 ~ 1992-07-24
    North tip of island (NE of 1927 dome)
  3. 1951년VEI 0지질학적 추정
    1951-09-21 ~ 진행 중
  4. 1931년VEI 1관측 기록
    1931-10-31 ~ 진행 중
    1926-1927 dome
  5. 1926년VEI 2관측 기록
    1926-07 ~ 1928
    Between New and Old Bogoslof
  6. 1913년VEI ?지질학적 추정
    1913-07 ~ 진행 중
    Tahoma Peak
  7. 1909년VEI 2관측 기록
    1909-09 ~ 1910-09-19
    Tahoma Peak
  8. 1908년VEI ?지질학적 추정
    1908-01-15 ~ 진행 중
    Metcalf Peak
  9. 1906년VEI 3관측 기록
    1906-03-01 ~ 1907-09-01
    Metcalf Peak, McCullough Peak
  10. 1883년VEI 3관측 기록
    1883-09-27 ~ 1895
    New Bogoslof (Grewingk)
  11. 1806년VEI 2관측 기록
    1806 ~ 1823
    Old Bogoslof (Castle Rock)
  12. 1796년VEI 3관측 기록
    1796-05 ~ 1804
    Old Bogoslof (Castle Rock)

외부 링크

⚠ 참고용 정보입니다. 재난 대응에 사용하지 마세요.