How is the accuracy verified?
It has been verified first by systematic laboratory testing under the precisely controlled biaxial loading conditions. This was followed by field verification tests, made by utilizing known overburden weight as a test loading at the world famous Underground Research Laboratory of Atomic Energy of Canada, Pinawa, Manitoba. Details of the accuracy studies are presented in Category 2; gInvention of Serata Probeh. Another verification is a nearly perfect agreement of the measured gradient of intrinsic lateral tectonic stress gradient with its theoretical value established by the Japanese government field test program. The measurement results are presented in Fig. 5-3 in Category 5.
