Physical Conditions of Earthquake Faults 2 : A Model of Strike-slip Faults with Various Dip Angles

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The writer deals with a model of strike-slip faults for the purpose of studying the characteristics of crustal deformation when the dip of the fracture plane is not given as 90°. The model is presented on the assumptions which are similar to those in the previous paper, but no assumption on the dip angle is made in the present one. An orthodox analysis of such a model being very difficult even in the simplest case, the writer reduces the problem to the Laplace equation and solves it by the relaxation method as well as by model experiments based on the electric-elastic analogy.横辷り型であり,且つそのdipが90°であるような断層模型については,既に前報においてその基本的特性を考察し,いくつかの実例に対する比較をも試みて来た.今回はこの模型を拡張してdipが90°でない場合にどういう特性の地殻変動(水平移動)が期待されるかを調べたものである.このような力学模型に対する解析的な解を求めることは極めて困難であるから,dipが60°の場合についてはrelaxation methodによる数値解法を行い,更に一般の場合については(ψ=90°～60°)電場と辷り歪の場との類似性に基づく模型実験を行つた.
1959-05-15