スプートニク日本
最も危険な火山はハワイにあるキラウエア火山。今年５月に強い噴火を起こし、地元住民が島から避難した。世界第２位の大きさを誇るハワイのマウナ・ロア山もリスト入りした。
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© AP Photo / U.S. Geological Survey
This Friday, May 4, 2018, aerial image released by the U.S. Geological Survey, at 12:46 p.m. HST, a column of robust, reddish-brown ash plume occurred after a magnitude 6.9 South Flank of Kīlauea earthquake shook the Big Island of Hawaii, Hawaii. The Kilauea volcano sent more lava into Hawaii communities Friday, a day after forcing more than 1,500 people to flee from their mountainside homes, and authorities detected high levels of sulfur gas that could threaten the elderly and people with breathing problems.
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© AP Photo / Ira Schwarz
FILE - In this March 25, 1984, file photo, lava erupts along Mauna Loa volcano in Hawaii. Hawaii's Kilauea volcano has captivated people around the world by shooting lava high into the sky and sending rivers of molten rock pouring down hillsides into the ocean over the past month, but it's only one of many volcanoes in the islands.
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© AP Photo / U.S. Geological Survey
This Friday, May 4, 2018, aerial image released by the U.S. Geological Survey, at 12:46 p.m. HST, a column of robust, reddish-brown ash plume occurred after a magnitude 6.9 South Flank of Kīlauea earthquake shook the Big Island of Hawaii, Hawaii. The Kilauea volcano sent more lava into Hawaii communities Friday, a day after forcing more than 1,500 people to flee from their mountainside homes, and authorities detected high levels of sulfur gas that could threaten the elderly and people with breathing problems.
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© AP Photo / Ira Schwarz
FILE - In this March 25, 1984, file photo, lava erupts along Mauna Loa volcano in Hawaii. Hawaii's Kilauea volcano has captivated people around the world by shooting lava high into the sky and sending rivers of molten rock pouring down hillsides into the ocean over the past month, but it's only one of many volcanoes in the islands.
リストのうち５つの火山はアラスカ州にあり、大型の都市、重要なインフラ施設、通りの激しい空中回廊付近にある。
残り１１の火山はワシントン州、カリフォルニア州、オレゴン州に集中。通常、全て人口密集地帯にあり、噴火が起きれば大規模な物的・人的被害が予測される。
イエローストーンの火山は「非常に高い脅威」の火山リストには入らなかった。専門家は、異常な動きを検出しなかったためだ。
USGSの報告書には他に「高い脅威」の火山３９、「中程度の脅威」が４９、「低い脅威」が３４あり、「非常に低い脅威」の火山は２１となっている。
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