Birdwatch Archive

Birdwatch Note Rating

2024-03-09 18:18:30 UTC - HELPFUL

Rated by Participant: EF37A2052EFDDB7B400F967DF0E8A340E8E7DBFBC1321F5C4075FFA75952BDE3
Participant Details

Original Note:

地盤震動の基本を無視した間違った内容が含まれる動画です 地震動は工学的基盤(S波速度Vs約500m/s以上)から表層地盤を通る際に振幅が増幅されます https://www.j-shis.bosai.go.jp/faq-siteamp-and-shakiness#more-7812 能登半島地震でPGAが2828galとなったのは表層地盤上の観測点であるISK006(Vs260~390m/s)です https://www.kyoshin.bosai.go.jp/cgi-bin/kyoshin/db/sitedat.cgi?0+ISK006+knet 動画内で地盤増幅の差を考慮せず原発の基準地震動(Vsが700m/s程度以上)とK-NETの強震記録を比較していますが,これは物理的に間違いなので両者の大小関係を見ることに意味はありません

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All Information

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