In 2021, the Seismic Experiment for Interior Structure (SEIS) — the seismometer placed on the surface of Mars by NASA’s Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) lander — detected two significat marsquakes that occured on the planet’s far side from the lander. Schematic view of the propagation of seismic waves in the Martian crust and seismic conversions at the base of the discontinuity,...