Many applications related to ground-motion studies and engineering seismology benefit from the opportunity to easily download large dataset of earthquake recordings with different magnitudes. In such applications, it is important to have a reliable seismic characterization of the stations to introduce appropriate correction factors for including site amplification. Generally, seismic networks in Europe describe the site properties of a station through geophysical or geological reports, but often ad-hoc field surveys are missing and the characterization is done using indirect proxy. It is then necessary to evaluate the quality of a seismic characterization, accounting for the available site information, the measurements procedure and the reliability of the applied methods to obtain the site parameters.In this paper, we propose a strategy to evaluate the quality of site characterization, to be included in the station metadata. The idea is that a station with a good site characterization should have a larger ranking with respect to one with poor or incomplete information. The proposed quality metric includes the computation of three indices, which take into account the reliability of the available site indicators, their number and importance, together with their consistency defined through scatter plots for each single pair of indicators. For this purpose, we consider the seven indicators identified as most relevant in a companion paper (Cultrera et al. 2021): fundamental resonance frequency, shear-wave velocity profile, time-averaged shear-wave velocity over the first 30 m, depth of both seismological and engineering bedrock, surface geology and soil class.

许多与地面运动研究和工程地震学相关的应用都受益于轻松下载不同震级的大型地震记录数据集的机会。在此类应用中，重要的是要有可靠的台站地震特征，以引入适当的校正因子以包括站点放大。通常，欧洲的地震网络通过地球物理或地质报告描述台站的站点属性，但通常缺少临时现场调查，并且使用间接代理完成表征。然后，有必要评估地震表征的质量，考虑可用的站点信息、测量程序以及获得站点参数的应用方法的可靠性。在本文中，我们提出了一种评估站点特征质量的策略，并将其包含在台站元数据中。这个想法是，一个站点特征良好的站点应该比信息差或不完整的站点具有更大的排名。建议的质量指标包括三个指标的计算，这些指标考虑了可用站点指标的可靠性、它们的数量和重要性，以及通过每对指标的散点图定义的一致性。为此，我们考虑了在配套论文（Cultrera 等人，2021 年）中确定的最相关的七个指标：基本共振频率、剪切波速度剖面、前 30 m 的时间平均剪切波速度、深度地震和工程基岩、地表地质和土壤等级。