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Back震度7の緊急地震速報取り消し 「千島でM9.9」と過大評価―気象庁課長「深くおわび」
震度7の緊急地震速報取り消し 「千島でM9.9」と過大評価―気象庁課長「深くおわび」
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時事通信1 hour agoScience2 min readJapanView translation

震度7の緊急地震速報取り消し 「千島でM9.9」と過大評価―気象庁課長「深くおわび」

Quick Look

気象庁は16日午後0時40分に北海道から北陸・東海地方に緊急地震速報(警報)を発表したが、カムチャツカ半島付近のM6.9の地震を千島列島でM9.9と誤って評価したため、48分に取り消した。海老田綾貴地震津波監視課長は謝罪し、ソフトウェアの処理問題の可能性を挙げた。

AI-generated summary

Why It Matters

緊急地震速報は、地震の発生を検知して強い揺れが予想される地域に警報を出すシステムである。過去に観測史上最大の地震は1960年にチリで発生したM9.5である。

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気象庁は16日、北海道から北陸・東海地方にかけて午後0時40分に緊急地震速報(警報)を発表し、同48分に取り消した。カムチャツカ半島付近でマグニチュード(M)6.9の地震が発生し、北海道函館市で震度1を観測したが、「千島列島でM9.9の地震発生」と過大評価したため。誤った速報では、北海道と東北で予測される揺れの大きさを最大震度7程度と発表していた。

「緊急地震速報」とは 用語解説・ニュース

気象庁の海老田綾貴地震津波監視課長は記者会見し、「大変な迷惑をおかけしましたことを深くおわびする」と謝罪した。外部からのサイバー攻撃はなく、コンピューターのソフトウエアの処理に問題があった可能性が高いという。

世界の観測史上、規模が最も大きかった地震は1960年に南米チリで起きたM9.5。M9.9というほぼあり得ない数字を発表した原因も含め、海老田課長は調査中と述べた。

What to Watch

AI outlook — possibilities, not facts

  • 気象庁がソフトウェアの問題を特定し、再発防止策を発表する

    Likely · Within weeks

Open Questions

  • ソフトウェアのどの部分に問題があったのか
  • 同様の誤報を防ぐためにどのような対策が取られるのか
  • 今回の誤報が一般市民に与えた影響の詳細

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This article was originally published by 時事通信.

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