泥火山の乱れと静かなマグニチュード6の断層滑落のダイナミックなトリガー
Zaur Bayramov1,2, Renier Viltres1, Cécile Doubre1
1Institut Terre et Environnement de Strasbourg UMR 7063, Université de Strasbourg, CNRS, Strasbourg, France.
まとめ
大規模な地震はクラ盆地から1000km離れた泥の火山の噴火と断層の滑落を引き起こした. 地震波は 深い孔の圧力を変化させ 広範囲に広がった地形変形を引き起こした
科学分野:
- 地理学
- 構造学
- 地震学
背景:
- 大規模な地震は地質学的な出来事を 遠隔的に引き起こすことができますが そのメカニズムは 十分に理解されていません
- 流体豊富な盆地との地震波の相互作用については,さらなる調査が必要である.
研究 の 目的:
- 地質学的構造に起因する遠隔地震波の誘発メカニズムを調査する.
- 2023年のカラーマンマラス地震がクラ盆地に及ぼす影響を分析する.
主な方法:
- 変形マッピングのためにインターフェロメトリック合成開口レーダー (InSAR) を利用した.
- 総合的な分析のための地域地質学と地震データを統合した.
- クーラ盆地におけるコセイスミックとポストセイスミック反応を分析した.
主要な成果:
- 56の泥火山での変形および/または噴火が観察されました.
- 7つの断層で センチメートルのスケールで アセイミック・スリップを検出した
- 炭化水素田の下の局所的な膨張を特定した.
- マグニチュード6.1に相当する 短時間の変形現象を特徴付けました
結論:
- カラーマンマラス地震による地震波は,クラ盆地で重要な地質学的変形を引き起こした.
- 地震波によって引き起こされる 穴の圧力の変化が,アセイミック・スリップと泥の火山活動の原因である可能性が高い.
- この研究は,遠隔地震と流体を含む地質学的システムの複雑な相互作用を強調しています.
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