On the Revision Triangulation after the Great Kanto Earthquake

概要

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In relation to the research of the present crustal movemont in the South Kanto District, the records of the retriangulation made soon after the Great Kanto Earthquake of 1923 have been reanalized. The horizontal movement derived by the present analysis is well accordant with other observed facts, such as the vertical movement discovered by the re-leveling. The crustal movement associated with the earthquake is estimated to have resulted from a shallow dip thrust faulting with large lateral slip. From the amount of the horizontal displacement near the fault plain, the dip of the fault is estimated as 25°-40° in NE direction. The strain change of the earth's crust at the time of the earthquake shows that the crust in the source region had been compressed toward north-south before that time.
日本測地学会の論文