裂け目に対するスーパーシャー移行メカニズム
Eric M Dunham1, Pascal Favreau, J M Carlson
1Department of Physics, University of California, Santa Barbara, CA 93106, USA. edunham@physics.ucsb.edu
まとめ
より強い断層は,切断波の速度を超えた断裂を加速させることができ,これは3Dの亀裂に特有の現象です. この超切断メカニズムは,断層異質性のバリアとアスペリティのモデルを区別するのに役立ちます.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- 地震学 地震学とは
- 地震の断裂のダイナミクス
背景:
- 断層破裂は,ストレスと断層エネルギーの異質性により,複雑な経路と変速を示す.
- 以前のモデルでは,故障の異質性を区別できないものとして扱ったことが多かった.
研究 の 目的:
- 切断波の速度を超える断層破裂の現象を調査する.
- 断層異質性のバリアとアスペリティモデルを区別する.
主な方法:
- 地震データの分析. 地震データの分析.
- 3次元のクラック行動のモデリング.
主要な成果:
- 局所的により強い断層部分が,シーア波速度 (スーパーシーア) を超える速度で破裂を起こすことが観察されました.
- この超切断メカニズムは,バリアモデルとアスペリティモデルを区別する方法を提供します.
結論:
- スーパーシーア現象は,三次元裂け目に特有のものです.
- 高強度バリアはエネルギーを集約し,破壊的な地面運動パルスを発生させる可能性があります.
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