| 摘要 |
<p>For determining the laminar structure and other characteristics of a ground, oscillation sensors (1, 2a, 2b, 2c) for detecting the vertical component or vertical and horizontal components of oscillations are disposed at three or more points (A, B1, B2, B3) within a comparatively small area at ground level to measure microseisms simultaneously at the respective points. If necessary, the locations of said points are varied. Measurements are performed at the respective locations and the vertical, or vertical and horizontal, oscillation data thus generated are analyzed. This method not only permits an expedient, positive and accurate assessment of the laminar structure and other characteristics of the ground but also allows the ground structure to be measured even when the area available for measurement is small. <IMAGE></p> |
