Rapid post-earthquake loss assessments require as input the ground motion footprint of the event. These footprints account for the geographical distribution of the seismic intensities, which, at the same time, depend on characteristics of the event such as magnitude, location, depth, focal mechanism, and orientation of the fault plane. For most earthquakes with M_W ≥ 5, moment tensor solution and, hence, the characteristics of the two nodal-planes are available. This paper proposes a simple set of rules for choosing the likely fault plane from the two nodal planes, based on a previous characterization of the seismic sources in the area under study that are commonly used in probabilistic seismic hazard analyses. With the selection of the fault plane, a critically required information for generating the parametric ground motion footprint is at hand in a matter of minutes, to be later used in the loss assessment phase. These almost real-time loss assessments are useful for different disaster risk management activities ranging from emergency planning and management to triggers of parametric insurance instruments. The application of this methodology is illustrated for three events, two in Mexico and another in Guatemala, where loss results and their geographical distributions at country level in some cases are highly sensitive to the selection of the correct nodal plane as the fault plane, showing that the proposed rules yield congruent results with the observed and recorded ground motions.

快速的震后损失评估需要输入事件的地面运动足迹。这些足迹说明了地震烈度的地理分布，而地震烈度的地理分布同时取决于事件的特征，例如震级，位置，深度，震源机制和断层平面的方向。对于大多数M _W地震 ≥5，力矩张量解以及两个节点面的特性均可用。本文基于先前在被研究区域中通常用于概率地震危险分析的地震源特征，提出了一套简单的规则来从两个节点平面中选择可能的断层平面。选择断层平面后，几分钟之内就可以生成用于生成参数化地面运动足迹的关键信息，稍后将在损失评估阶段使用。这些几乎实时的损失评估可用于各种灾害风险管理活动，从应急计划和管理到参数保险工具的触发。说明了此方法在三个事件中的应用，