目前,对于地震矩及地震应力降与震级的关系存在着不同的看法。本文就此问题进行简单的讨论。对于大地震而言,可以近似地认为地震应力降与震级无关。但这种关系不能简单的外推到中小地震中,即使对于同一震级范围,上述参数也还存在着区域性的差异。下面给出一些理论分析结果和实测数据的实例。 At present, there are different opinions on the relationship between the seismic moment and the stress drop of the earthquake and the magnitude. This article on this issue for a simple discussion. For large earthquakes, it can be approximately assumed that the earthquake stress drop has nothing to do with the magnitude. However, this relationship can not be simply extrapolated to small earthquakes. Even for the same magnitude range, there are still regional differences in the above parameters. The following gives some examples of theoretical analysis and experimental data.