Constraints for the Martian Crustal Structure From Rayleigh Waves Ellipticity of Large Seismic Events

Abstract For the first time, we measured ellipticity of direct Rayleigh waves at intermediate periods (15–35 s) on Mars using recordings three large seismic Martian events, including S1222a, largest event recorded by InSight mission. These measurements, together with P‐to‐s receiver functions and P‐wave reflection times, were utilized for performing a joint inversion local crustal structure landing site. Our results are compatible previously reported intra‐crustal discontinuities around 10 20 km depths, whereas preferred models show strong discontinuity ∼37 km, which is interpreted as crust‐mantle interface. Additionally, support presence shallow low‐velocity layer 2–3 thickness. Compared to nearby regions, lower wave velocities derived crust, suggesting higher porosity or alteration whole crust.