GNGTS 2022 - Atti del 40° Convegno Nazionale

516 GNGTS 2022 Sessione 3.3 Fig. 2 - On top it is shown the raw (not filtered) dataset with its corresponding Frequency-Wavenumber (FK) spectrum and the spatial variation of the Power Spectral Density (PSD). On bottom, the same data window after a filtering work-flow which removes both the incoherent and coherent noise and its corresponding FK spectrum and PSD. Fig. 3 - Performance of the semblance based event detector for a time window where a microseismic event was recorded. The peak in the time series coherency values that exceeds the dynamic threshold indicates the detection of the seismic event.