Repeated precise gravity surveys were taken in earthquake risk
areas of the Tokai and Tohoku districts in Japan. The purpose of
the survey was to detect secular gravity change before earthquakes
International gravimetric readings were taken at 187 stations in 34
cities and 15 countries and regions around the Circum-Pacific area.
9 Lacoste-Romberg model G gravity meters were used during the ...
Acting as the international latitude measurement service(ILS), this
international joint measurement of latitude was carried out from 1899
The ILS central station(Mizusawa) used the measured ...
Terrestrial and celestial reference frames and the earth rotation parameters
are determined from the global geodetic VLBI observations from 1984.
The data include site positions at 1988, site proper ...