Tomographic imaging based on long-term ambient seismic noise measurements, mainly the phase information from surface waves, has been shown to be a powerful tool for geothermal reservoir and monitoring. In this study, we utilize data dense nodal array (192 3C nodes within 20 ) over ultra-short observation period (4.7 days) reconstruct waves determine high-resolution (0.2 km) three-dimensional (3...

Identification of soil condition at the working face a tunnel boring machine (TBM) is key factor for efficiency and safety TBM tunneling. The paper presents first application Horizontal-to-Vertical Spectral Ratio (HVSR) method on microtremors induced by during tunnelling. innovative based development an easy-to-use economical early-warning system, which aims to confirm, or otherwise, profile es...