断層の大きさに依存する断層エネルギーは,多層地震とカスケード地震を説明する
Alice-Agnes Gabriel1,2, Dmitry I Garagash3, Kadek H Palgunadi4,5
1Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA.
まとめ
小さな地震と大きな地震は 断裂の過程が異なります この研究は,すべての大きさの複雑な地震のカスケードを説明する,断裂エネルギーの新しいスケーリング法を明らかにします.
科学分野:
- 地震科学
- 地理学
- 地震学
- 骨折メカニズム
背景:
- 地震は,多重欠陥と多重イベントのシーケンスを含む幅広い規模と複雑な破裂行動を示す.
- 地震のエネルギー予算のスケーリングは,多くの観察にもかかわらず,まだ十分に理解されていません.
- 現存するモデルでは 異なる地震スケールで観測される様々な現象を 説明するのに苦労しています
研究 の 目的:
- 小さな地震と大きな地震の 異なる断裂過程を調査するためです
- 地震の断裂エネルギーの新しいスケーリング関係を確立するために.
- 断層圏内の複雑な地震の発生を説明するために
主な方法:
- 地震観測と物理に基づく地震モデルの組み合わせ
- 地震エネルギー予算の動的弱体化と再強化効果を分析した.
- 超計算機を使って 大規模な地震をシミュレートした
主要な成果:
- 小規模な地震エネルギー予算のダイナミックな弱体化と再強化の両方に軽視できない役割を特定しました.
- 断裂エネルギーと断層の大きさの間の線形スケーリング関係が確立され,滑りによるスケーリングの顕著な断絶があった.
- 複雑な地震のカスケードが明らかにされ 断層のダメージゾーン内の700以上の多層の断層が含まれています
結論:
- 小さな地震と大きな地震の 根本的に異なる断裂プロセスを提案した.
- 全てのスケールで 統合された説明を提供した.
- 地震の起源と複数の断層の断層を駆動するメカニズムの理解を深めた.
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