Fig. 2: Attenuation profiles of Mars derived from tidal and seismic constraints.
From: Evidence for weak seismic attenuation in Mars’ deep mantle
a Shear attenuation \({Q}_{\mu }(r)\) profiles at Phobos tidal period of 5 h 33 min for ten mantle models (details of those models are summarized in Supplementary Table 1). b P-wave attenuation \({Q}_{P}(r)\) profiles converted and extrapolated from the shear attenuation \({Q}_{\mu }(r)\) profiles at the tidal period (5 h 33 min) in (a) to a seismic period of ~1 s (see “Methods”). Red arrows indicate the seismically constrained minimum \({Q}_{P}(r)\) values at each depth range determined in this study, whereas gray lines represent models (i.e., the strong attenuation group) excluded due to their incompatibility with these minimum \({Q}_{P}(r)\) values. c Profiles of \({Q}_{P}(r)\) for the HS 2 model (dashed gray curve in (b)), comparing scenarios with (purple) and without (gray) a basal mantle layer (BML).
