The estimate of seismic site effects by experimental approaches is based on different assumptions aimed at simplifying the complex actual site conditions and related uncertainties. However, the reliability of the results can increase if the experimental data is focused on quite strong seismic sequences and the on-site acquisition of a large number of signals is deemed strategic for the assessment of the expected phenomena. Based on these considerations, the ground motion at the Red Zone sector of Amatrice hill, violently struck by the 2016–2017 Central Italy seismic sequence, was analyzed via an observational approach. A large set of weak motions (moment magnitudeM_w 2.5–3.9) was analyzed in this study by means of standard (SSR) and horizontal to vertical (HVSR) spectral ratio techniques. The results from the experimental analysis of the site effects by using weak motion and noise signals show a significant amplification at the top of Amatrice hill with a remarkable polarization of the motion and changes in spectral shapes according to the topographic setting of the relief.

通过实验方法估算地震现场影响是基于不同的假设，旨在简化复杂的实际现场条件和相关的不确定性。但是，如果将实验数据集中在相当强的地震序列上，并且现场采集大量信号被认为对评估预期现象具有战略意义，则结果的可靠性会提高。基于这些考虑，通过观测方法分析了2016-2017年意大利中部地震序列猛烈撞击的阿马特里切斯山红色区域的地震动。大量的弱运动（矩量级M _w在本研究中，通过标准（SSR）和水平与垂直（HVSR）光谱比技术对2.5-3.9）进行了分析。通过使用微弱的运动和噪声信号对站点效应进行的实验分析结果表明，在阿马特里切山顶上的放大显着，运动极化明显，并且根据地形的地形设置改变了光谱形状。