Abstract

Periodical (-20"..0") and random (-46"..+15") deflections of  the  light  beam  relative to the Earth surface were measured on the distance of 1.52 m during 109 days. The systematic non-refractional deflection of light beam down to the center of the Earth with average value of 11" .6 was discovered. The atmospheric refraction coefficient k was considered to be stable and equal to 0.140.05. The absolute optical gravimeter was suggested for the forecast of major earthquakes. It was determined that the Moon phases have impact on long-period deflections with two days lag.