实验室的岩石加压试验证明:在岩石加压直至破碎的过程中随着压力的增加,岩石在接近总崩溃时总伴随着越来越密集的声发射。地震工作者研究“以声报震”就是以此为依据的。岩石破裂以前产生的声发射,就是我们通常所说的“地声”,它不同于地震时我们人耳直接听到的宏观地声。因此,这样的地声也叫作微观地声。 Rock compression tests in the laboratory have shown that as the pressure increases during rock pressurization until crushing, rocks are always accompanied by increasingly dense acoustic emission near the total collapse. Earthquake workers to study “to report the earthquake” is based on this. The acoustic emission that preceded the rock’s rupture was what we commonly refer to as “earth noise,” which is different from the macro earthquakes heard directly by our ears when an earthquake strikes. Therefore, such earth tones are also called microscopic tones.