### Review of the State of the Art  
Recent studies in structural health monitoring (SHM) have highlighted the need for research focused on buildings located in seismic zones, where long-term structural monitoring and vibration data collection are essential for understanding damage progression and ensuring structural stability. A notable example is the study of historic buildings in the center of Lucca, Italy [6], which employs an ambient vibration analysis to track changes in dynamic properties without the need for artificial loads--an approach particularly beneficial in densely populated urban areas [15]. A research project led by the Sensor Laboratory (LabSens) at Pontificia Universidad Catolica de Valparaiso (PUCV) focused on structural health monitoring of tunnels in Santiago and Valparaiso, Chile, two densely populated areas in a seismically active zone. This project, known as \"Shaking Tunnel Vision\", [16] used seismic instrumentation to analyze the dynamic response of underground structures, providing valuable data on their responses during seismic events and ambient vibrations. Similar structural monitoring technologies have been implemented using triaxial sensors to capture both ambient vibrations and moderate seismic activity [4; 17]. Other recent case studies include the monitoring of a group of reinforced concrete buildings in Sendai, Japan, located in an area of high seismic activity. This study employed an advanced sensor system, including accelerometers and fiber optic sensors, to capture vibrations and deformations in the structures during seismic events [18]. The application of a continuous monitoring approach in Sendai enabled the assessment of the cumulative impact of moderate earthquakes on structural rigidity and the analysis of how changes manifest over time. These examples highlight the importance of structural monitoring in seismic environments and show how advanced SHM technologies, such as high-precision accelerometers and fiber optic sensors, make it possible to capture variations in structural responses to seismic events and environmental vibrations. These approaches demonstrate that long-term monitoring in seismic zones not only captures the impact of significant events but also documents gradual changes in the dynamic properties of the structure that may develop over time, thus reinforcing the need for continuous structural monitoring. Regarding the methodology, structural monitoring approaches have evolved to integrate sensors, such as triaxial accelerometers, which capture dynamic responses along multiple axes without interrupting the operation of the monitored structures. The most commonly used methods include Operational Modal Analysis and the Stochastic Subspace Identification with Covariances (SSI-COV) method [18], which allow the identification of a structure's modal parameters, such as natural frequencies and mode shapes, based on ambient vibrations. These methods offer a robust solution for real-time analysis, enabling engineers to accurately assess the condition of structures without impacting their daily operation [19]. Regarding the measuring devices, structural health monitoring employs a variety of sensors, with triaxial accelerometers playing a crucial role in structural monitoring, particularly in vibration analysis, as they provide an accurate representation of the structural response to environmental and seismic loads. Long-term structural monitoring is essential for detecting variations in the dynamic properties of structures that emerge over time due to environmental factors and dynamic loads. Recent studies have shown that the early detection of anomalies through continuous monitoring enables the implementation of more effective and sustainable long-term preventive measures [20]. Although numerous studies on structural monitoring exist [21], few have explored the comparison of records obtained from various excitation sources within the same building, such as ambient vibrations, nearby construction activities, and seismic events.