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Mikurajima

성층화산 · Japan · 851m

The southern flanks of Mikurajima volcano are seen in this aerial view from the SSW. Oyama, the summit of the island, lies in shadow on the left horizon. The small Ichinomori spire is on the center, while the flat-topped Shipunegamori lava dome is at the far right.
The southern flanks of Mikurajima volcano are seen in this aerial view from the SSW. Oyama, the summit of the island, lies in shadow on the left horizon. The small Ichinomori spire is on the center, while the flat-topped Shipunegamori lava dome is at the far right. · 사진: Copyrighted photo by Akira Takada (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
성층화산
국가
Japan
지역
북서태평양 / Izu Volcanic Arc
해발
851m
좌표
33.874, 139.602
마지막 분화
-4100년
판구조 환경
Subduction zone / Oceanic crust (< 15 km)
화산 지형
Composite
주요 암석
Basalt / Picro-Basalt
지질학적 요약

Mikurajima is a small steep-sided island located between the more well-known Miyakejima and Hachijojima volcanoes. Oyama forms the summit of the basaltic-to-andesitic island, which is surrounded by cliffs and dissected on the southern-to-eastern sides. The sparsely populated island consists of a large stratovolcano with lava domes on the SE side. Several small sea stacks are located immediately offshore. Growth of the stratovolcano took place until about 7,000 years ago, and the latest activity occurred about 6,000 years ago, when explosive eruptions and pyroclastic surges accompanied lava dome growth.

Wikipedia 요약

영어 요약

Mikura-jima (御蔵島) is an inhabited volcanic Japanese island in the Pacific Ocean. The island is administered by Tōkyō Metropolis and is located approximately 200 kilometres (120 mi) south of Tokyo and 19 kilometres (12 mi) south-southeast of Miyakejima. It is one of the Izu Seven Islands group of the seven northern islands of the Izu archipelago. Mikurashima is administratively part of Mikurashima Village under Miyake Subprefecture of Tokyo Metropolis. As of 2009, the island's population was 351. Mikura-shima is also within the boundaries of the Fuji-Hakone-Izu National Park.

Wikipedia · CC BY-SA · 전체 기사 보기 →

분화 이력

요약 (VEI 시계열)
막대를 클릭하면 개별 분화가 표시됩니다
5050 BCE~4955 BCE · 1건 · 최고 VEI ?4195 BCE~4100 BCE · 1건 · 최고 VEI ?5050 BCE4860 BCE4575 BCE4385 BCE4195 BCE

상세 타임라인

  1. 기원전 4100년 (±100년)VEI ?지질학적 추정
    BCE 4100 ~ 진행 중
    Tsubunegamori & Yasukajigamori domes
  2. 기원전 5050년VEI ?지질학적 추정
    BCE 5050 ~ 진행 중

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