地震简问简答/Can the position of the moon or the planets affect seismicity?

Q: Can the position of the moon or the planets affect seismicity?

A: The moon, sun, and other planets have an influence on the earth in the form of perturbations (small changes) to the gravitational field. The relative amount of influence is proportional to the objects mass, and inversely proportional to the third power of its distance from the earth. No significant correlations have been identified between the rate of earthquake occurrence and the semi-diurnal tides when using large earthquake catalogs. There have, however, been some small but significant correlations reported between the semi-diurnal tides and the rate of occurrence of aftershocks in some volcanic regions, such as Mammoth Lakes. (UC Berkeley)

问：月亮或是行星的位置对地震活动有影响吗？

答：太阳、月亮和其它行星对地球产生的影响是以使地球引力场产生扰动（微小变化）的形式体现的。其影响程度与物体的质量成正比，与其到地球距离的三次方成反比。当前从对大地震的纪录数据看，尚不能确定地震的震级和半日潮有着有效的相关性。但是，有报告发现半日潮和一些火山区地震的余震之间有微小但不可忽视的相关性，如满某什湖（Mammoth Lakes）（加利福尼亚大学伯克利分校）。