Shimpei Sato
チャンネル登録者数 1.2万人
5.6万 回視聴 ・ 398いいね ・ 2020/05/23
Summarized the eruptions of 1 km3 DRE or more that have been in the Japanese archipelago since 300,000 years ago.
#1...300,000 to 120,000 years ago
• 30万年日本の巨大噴火史① 300,000～120,000年前
#2...119,000 to 60,000 years ago
• 30万年日本の巨大噴火史② 119,000～60,000年前
#4...29,940 years ago to the present
• 30万年日本の巨大噴火史④ 29,940年前～現在
About the age:
Only those that can be identified to some extent are taken up. Stratovolcanoes, which mainly erupt lava flows, are often of unspecified age, and there were many eruptions that could not be taken up.
About the eruption amount:
Focusing on those for which Dense Rock Equivalent can be specified, we also cover those for which eruption of 1 km3 DRE or more is certain even if it cannot be specified.
Data reference source:
GSJ "Accumulated magma eruption staircase map of major Quaternary volcanoes in Japan"
www.gsj.jp/researches/openfile/openfile2014/openfi…
GSJ "1/200,000 Japanese volcano map"
gbank.gsj.jp/volcano/vmap/volcano20/volcano.html
Machida and Arai "Atlas of Tephra in and around Japan"
etc.
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【富士山の噴火と被害】300年前の噴火からの教訓／火山灰が5cm降るとライフラインはすべて停止／火山灰の影響は地震被害より長期／スロースリップから地震を予知／噴火リスクに科学も活かせ／地学の面白さ
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