Abstract
An ellipsoid of the observed strain is not perfectly analogous to the ellipsoid of the applied force on the crust, generally. In order to study the anisotropic strain of the crust, observations of the areal strain on the earth tide, the load tide caused by the oceanic tide, and the anomalous strains caused by rapid changes of the atmospheric pressure and heavy rain have carried out in some azimuths at the Osakayama Tunnel and the Suhara Observatory.
