Day-to-day PSDs of the original vertical acceleration signal of station M11B for the (a) autumn and (d) spring data sets and for the vertical signal acceleration corrected from the compliance component using a day-to-day estimated scTFFR for the (b) autumn and (e) spring data sets and the monthly stacked scTFFR for the (c) autumn and (f) spring data sets. The corrections were carried out in the frequency range defined by the day-to-day coherence significance threshold for the day-to-day correction. For the monthly stacked correction, it was carried out using the best frequency range found of the season related day-to-day correction. The PSDs have been estimated using a 4-pi spheroidal window with |$N_w=$| 900 s, |$N_o=$| 450 s and a median average.