The energy propagated by a seismic event has been of great interest to the community of geophysics and seismologists. In recent times, several studies have been published with the purpose of showing the contributions of each type of seismic wave to the total energy propagated. In this context, diffuse field theory, Green functions and motion correlations have been used to determine energy contributions or partitions based on the type of propagated seismic waves or the degrees of freedom of the medium. In this work, we implement the boundary element method to derive seismic wave energy partitions in interfaces (vacuum–solid, fluid–solid and solid–solid). Theoretical results for two-dimensional infinite spaces show that for a Poisson solid, the energy partitions are 25% for P waves and 75% for SV waves; our results are coincident with such values. However, for interfaces, energy partitions are strongly dependent on the propagation velocities and Poisson's ratio of the media they join. For the case of a vacuum–solid half-space, our results are coincident with those already published and whose energy amplification reaches a value of 2.0 for a Poisson solid.

地震事件传播的能量引起了地球物理学家和地震学家的极大兴趣。最近，为了显示每种类型的地震波对传播的总能量的贡献，已经发表了几项研究。在这种情况下，已经根据扩散的地震波的类型或介质的自由度，使用了扩散场理论，格林函数和运动相关性来确定能量贡献或分区。在这项工作中，我们实施边界元方法来导出界面（真空-固体，流体-固体和固体-固体）中的地震波能量分配。二维无限空间的理论结果表明，对于泊松固体，P波的能级分配为25％，SV波的能级分配为75％。我们的结果与这些值一致。但是，对于界面，能量分配在很大程度上取决于传播速度和它们所加入介质的泊松比。对于真空固体半空间，我们的结果与已经发表的结果一致，对于泊松固体，其能量放大率达到2.0。