Herewith the crustal deformations as revealed by means of precise geodetic surveys are discussed in connection with the crustal deformations revealed as the results of topographical observations, based on the theory of isostasy.
With regard to the crustal deformations found by geodetic methods, it is pointed out that the acute crustal deformations which might have accompanied the destructive earthquake is seen as occurred in reverse direction against the pre- or post-seismic chronic crustal deformations.
It is also pointed out that the mode of the acute crustal deformations is such that the earth's crust rises where the gravitational anomalies are positive and vice versa, and that the mode of crustal deformations found as the results of topographical observations seems to agree with that of the acute crustal deformations.
