2001年 Ms 8.1 中央クンルン地震で発生した共地震性衝突滑落と破裂の長さ
Aiming Lin1, Bihong Fu, Jianming Guo
1Institute of Geosciences, Faculty of Science, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan. slin@ipc.shizuoka.ac.jp
まとめ
2001年の中央クンルーン地震は,16.3mの滑りで400kmの表面破裂を記録した. クンルン断層のこの大きなストライク・スリップ・モーションは,チベットがチベットであることを示しています.
科学分野:
- 地質物理学 地質物理学とは地質物理学です.
- テクトニクス (地質学) とは
- 地震学 地震学とは
背景:
- チベットの高原は,インドプレートとユーラシアプレートの衝突が続いているため,構造的に活発です.
- 断層の振る舞いを理解することは,この地域の地震リスクの評価に不可欠です.
研究 の 目的:
- 2001年中央クンルーン地震の表面破裂の特徴を分析するために.
- 地震の断裂の長さと移動が地域構造に及ぼす影響を調査する.
主な方法:
- 地震の表面破裂ゾーンのフィールド調査.
- 地震データを分析し,地震の大きさや特徴を決定する.
主要な成果:
- 中部クンルン地震 (Ms 8.1) は,長さ ~400 km の表面破裂を生成しました.
- 最大の左側ストライクスリップの位移は16.3メートルに達し,共地震表面破裂で報告された最大のものです.
- イベントはチベットの北部で活発なクンルン断層に沿って発生しました.
結論:
- 広範囲にわたる断裂と大きな移転は,クンルン断層が地域構造的力を容認する上で重要な役割を果たしたことを示している.
- 地震の特徴は,クンルン断層の分割変形モデルを支持し,チベットが東へ押し出されることにつながった.
- これは,インドプレートがユーラシアプレートに北に向かって浸透し続けることを容認する.
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