Abstract
The Japanese coast, on both the Pacific and Japan Sea sides, can be divided into several regions, in each of which the monthly mean sea-levels at mareograph stations change almost identically. One of the most remarkable boundaries between such regions is located near the southern end of Kii-Peninsula, Honshû.
If two stations are situated in the same one of such regions as above mentioned, the change in the difference of monthly mean sea-levels between those stations may more conveniently be used for studying the vertical crustal deformation at the place than that in the monthly mean sea-levels themselves, because the former is less irregularly disturbed by meteorological and oceanographical effects.
The change in the difference of daily mean sea-levels between selected stations can also be used for tracing the detailed process of vertical crustal deformations.
By these procedures, the vertical crustal deformations before and after destructive earthquakes have been investigated. The results obtained are shown in figures.
