Some Tendencies found in the Movements of the Earth-Crust

概要

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Comparing the results of the revision survey in Katanohara-region with those of the previous ones, following interesting phenomena were found. (1) The earth-movements, horizontal and vertical, accompanied by the earthquake, have different characters in every areal block divided by fault-lines. (ii) In each areal block, the mean vector of the horizontal displacements lies nearly in the direction of the maximum inclination of a plane ξ=a+bx+cy, where x, y are the horizontal rectangular coordinates of any triangulation point, is its vertical displacement and a, b, c are the constants to be determined by the method of the least siuares with respects to all the triangulation points in the area under consideration. (iii) With regards to the whole region of Katanohara, there exists linear correlation between the numerical values of the vertical displacements and those of the horizontal ones. The above facts seem to bold in the other resurveyed regions, such as in Fukui region suffered by the earthquake and both the coal-mine regions of North Kyushu and Fukushima.
日本測地学会の論文