Bayonnaise rocks - Bayonnaise rocks

Japanese: ベヨネース列岩 - ベヨネースれつがん（英語表記）Bayonnaise rocks

A group of reefs located south of the Izu Islands in Tokyo. They are also called the Bayonnaise Rocks. The area is 0.01 ^km2 . No plants grow on these reefs, and they are a resting place for migratory birds. The Kuroshio Current flows around the area, making them a good fishing ground for skipjack tuna. On the seabed to the east of the Bayonnaise Rocks is a submarine caldera volcano (→ submarine volcano, caldera) about 8 km in diameter, and the Bayonnaise Rocks are on the western edge of its outer rim. It is an active volcano, and in its 1946 eruption it created a 100 m high island, which soon sank. To the east of this submarine caldera volcano, about 10 km from the Bayonnaise Rocks, is Myojinsho, the central cone of a submarine composite volcano. Myojinsho erupted underwater in 1952, and the Japan Coast Guard's Hydrographic Department observation ship "Daigo Kaiyomaru" was lost during an investigation, with 31 people killed. Eruptions continued intermittently until 1970, and even after 1971 there were signs of volcanic activity, such as the surrounding seawater turning cloudy white.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

東京都，伊豆諸島の南方にある岩礁群。ベヨネイズ列岩ともいう。面積 0.01km²。植物の生育しない岩礁で，渡り鳥の休息地。周辺は黒潮が流れ，カツオの好漁場。ベヨネース列岩の東側の海底には直径約 8kmの海底カルデラ火山（→海底火山，カルデラ）があり，ベヨネース列岩はその外輪山の西縁にあたる。活火山で，1946年の噴火では高さ 100mの島を生じたがまもなく沈下した。この海底カルデラ火山の東側，ベヨネース列岩から約 10kmに海底複式火山の中央火口丘である明神礁がある。明神礁は 1952年に海底噴火し，調査中の海上保安庁水路部観測船『第5海洋丸』が遭難，31人が死亡した。1970年まで断続的に噴火，1971年以後も周辺の海水が白く濁るなど，火山活動の兆候を示している。

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