Unknown active submarine volcano found beside Izu islands, “Eruption will affect large areas”

Around North to Izu islands, Japan Agency for Marine-Earth Science and Technology found extremely hot water spouting from the sea ground at a few tens of locations. The highest water temperature was 194℃. (381.2F)

It’s 100m deep under the sea. They also found mass of sulfur and pumice stones produced by past eruption.

The researching group analyzes it’s an active volcano. Because the water temperature is high, it is presumed that heating magma is under the hollow. Potential eruption will affect large areas because it’s shallow.



独立行政法人海洋研究開発機構は 伊豆諸島の北に海底から非常に熱い水が出てきている箇所が数10箇所あることを発見しました。最高温度は 194℃(華氏381.2度)でした。

海底100mの深さで 過去の噴火でできた硫黄や軽石なども たくさん見つかりました。

研究グループは 活動火山があると分析しました。水温が高いため 空洞の下に熱いマグマがあると推定されます。深さがそれほどないため この噴火は 広い範囲にわたって 影響を及ぼすだろうと考えられています。





Français :

Un volcan actif sous-marin inconnu découvert à côté des îles Izu. “Son éruption affectera une grande région”

Au Nord des îles Izu, la Japan Agency for Marine-Earth Science and Technology a trouvé des eaux extrêmement chaudes jaillissant au fond de la mer en un peu moins de 10 endroits. La plus haute température relevée a été de 194 ℃. (= 381,2 °F)

C’est à 100 m de fond. Ils ont aussi trouvé quantité de soufre et de pierres ponce produits par d’anciennes éruptions.

L’équipe de recherche détermine s’il s’agit d’un volcan actif. A cause de la haute température de l’eau, ils supposent que le magma en fusion est sous l’enfoncement. La prochaine possible éruption affectera du grande région parce que c’est superficiel.





About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


October 2012