STOCHASTIC ESTIMATION OF BROADBAND STRONG MOTIONS USING FRACTAL SOURCE MODEL : For the Northridge earthquake and the Western Tottori prefecture earthquake

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  • フラクタル震源モデルを用いた広帯域強震動の確率統計的評価 : ノースリッジ地震と鳥取県西部地震を対象として
  • フラクタル シンゲン モデル オ モチイタ コウタイイキ キョウシンドウ ノ カクリツ トウケイテキ ヒョウカ ノースリッジ ジシン ト トットリケン セイブ ジシン オ タイショウ ト シテ

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Abstract

Stochastic properties of broadband strong motions are investigated using the fractal source model. The model is described by the limited dynamic data reflecting uncertainty and heterogeneity on the fault plane. The soil ground model for source-site path is presented by the theoretical Green's function of the multi-layered half space. The simultaneous simulation test has been tried for the recorded ground motions at some sites in the 1994 Northridge earthquake and the 2000 Western Tottori prefecture earthquake. The average spectra and the duration time of the synthetics correspond well with those of the observed within 20 kilometers from the fault region.

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