Scientific objective A-5: Martian internal structure and composition

Our present understanding of the internal structure of Mars is principally based on interpretation of gravity data, analysis of SNC meteoroids, and on extrapolation of the Earth?2019s internal structure to the lower pressures of Mars interior. Mars is a one-plate planet and hence the strong seismicity associated with active plate-tectonics is very likely absent. Modeling efforts show that seismic activity is taking place at Mars based on the thermo-elastic cooling of the one-plate planet, as well as the re-equilibration of the high-topography volcanic complexes. Therefore, seismological and magnetic observations onboard the MetNet Landers will shed light on the interernal structure and composition of Mars. (et al, 2000, 1996)