Figure 2
From: High-resolution precipitation monitoring with a dense seismic nodal array
Seismic precipitation signals. (a) Displacement seismogram for a precipitation event on 19 April 2016 sampled by Station: 150 (black line), filtered at 100–200 Hz. Rain window (red) and noise window (blue) for following analyses are divided by dashed lines. (b) Averaged power spectral density for the rain window (red) and noise window (blue) in (a). Solid lines show original PSD, dashed lines show denoised PSD. The frequency range between 100 and 200 Hz is less affected by noise. (c) and (d) Averaged seismic power spectral density between 100 and 200 Hz before and after removing anthropogenic noise, respectively. Times used in this study are all in UTC.
