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On relating apparent stress to the stress causing earthquake fault slip

第 6 回 (2009/06/08) 地震発生論セミナー予告. On relating apparent stress to the stress causing earthquake fault slip. A. McGarr (1999, JGR). Does apparent stress vary with earthquake size?. 固体講座 D1 太田和晃. Satoshi Ide and Gregory C. Beroza (2001, GRL). 見かけ応力と地震の規模の関係. 見かけ応力：.

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On relating apparent stress to the stress causing earthquake fault slip

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  1. 第6回(2009/06/08)地震発生論セミナー予告 On relating apparent stress to the stress causing earthquake fault slip A. McGarr (1999, JGR) Does apparent stress vary with earthquake size? 固体講座 D1 太田和晃 Satoshi Ide and Gregory C. Beroza (2001, GRL)

  2. 見かけ応力と地震の規模の関係 見かけ応力： ・・・ 実験 (: load, : resist) ・・・ 自然地震 (G: rigidity, Ea: Seismic Energy, M｡: Moment) 1. McGarr (1999) Stick-Slip実験、及び様々な規模の自然地震の見かけ応力から の関係を示す。 2. Ide and Beroza (2001) • 1. McGarrでとりあげられた各研究の見かけ応力の推定を再考。 • 見かけ応力は地震の規模によらず一定 • であることを示す。

  3. 1. Mcgarr(1999) 既存の研究から、様々な規模の自然地震の見かけ応力の関係を整理 Underground Research Laboratory(URL) by Gibowicz et al.(1991) KTB borehall by Jost et al.(1998) Caion Pass by Abercrombie(1995) South Africa Mine Tremors by Mcgarr(1992, 1993) Southern California by Kanamori et al.(1993)

  4. 1. Mcgarr(1999) から　　と　 の関係をプロット 自然地震 を上限とする一定のべき乗則 Stick-Slip実験

  5. 2. Ide and Beroza(2001) 広い範囲でほぼ一定 Figure2. in Mcgarr(1999) 個々のスケールでは強いサイズ依存性？ 高周波側の観測限界によるunderestimate

  6. 2. Ide and Beroza(2001) 補正後のモーメント vs見かけ応力の関係 地震のサイズによらず、見かけ応力は一定

  7. 本セミナーでの位置づけ • 平面断層に成り立つスケーリング則その一 • 見かけの応力降下量と断層規模の関係

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