地殻変動と発震機構
スポンサーリンク
概要
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Geodetic survey and seismic observations are the two principal sources of geophysical information about the crustal movements. Advantages and disadvantages of these data are complemental with each other, so that the features of crustal movements would be better studied by their combined use. From this point of view, the present paper deals with the triangulation data and focal mechanisms of the shallow earth quakes in Japan and introduces examples in which the horizontal strain accumulation and earthquake mechanisms in the given area are attributed to crustal stresses of common mode. Possibilities of deriving more physical data on the crustal stresses from seismic observations are also discussed briefly.