Fig. 3: Observed and predicted receiver function (RF) power spectral densities (PSDs) at TSZ broadband seismograph.
From: Fluid upwelling across the Hikurangi subduction thrust during deep slow-slip earthquakes

Observed receiver function PSDs along (a) radial and (b) transverse directions. Panels below (a) and (b) show normalised eastward geodetic displacement at the co-located TAKP global navigation satellite system receiver station and the observed total power between 0.3 and 0.8 s periods. Predicted receiver function PSDs along (c) radial and (d) transverse directions for the best-fit model. Panels below (c) and (d) show VP/VS variation in the low-velocity layer and the ~3.4 km thick lower crustal layer above it, and the predicted total power between 0.3 and 0.8 s periods.