Fig. 8
From: Integration of distributed acoustic sensing for real-time seismic monitoring of a geothermal field
Temporal and spatial variation of the average spectral energy of DAS recordings in the 5 to 40 Hz frequency band. From surface to 100 m (TVD), a power spectral density (PSD) is computed trace by trace and the spectral energy is averaged in the target frequency band. The average spectral energy is displayed as a function of depth and time over the course of a working week (panel (a), from Monday to Sunday) or over one full working day (panel (b), the 2022-03-01, Tuesday)