Abstract
Precise gravity survey by means of six LaCoste & Romberg gravimeters was carried out in Miura and Boso Peninsulas during the period of November 11 to December 10, 1969 according to the recommendation of the Working Group for Gravity Survey and Precise Levelling in Japan. It was carried out under the predetermined routine, along the levelling route, to keep the quality of obtained data as uniform as possible, and a great care was taken in read-ing and handling for the gravimeters. Results of the survey are summarized in the present report. Mean value of closure error along the loops of measuring routes was about 0.07 mgal and the measuring ac-curacy of each gravimeter was estimated to be 0.02 mgal.
