Nasa’s InSight lander reveals internal structure of Mars

Analysis of marsquakes captured since probe landed in 2018 shows the Martian crust is between 12 and 23 miles thick

Nasa's InSight lander has revealed the depth of Mars's crust and the size of its central core by using data from dozens of marsquakes captured since the probe landed in 2018.

The Seismic Experiment for Interior Structure (SEIS) is a dome-shaped instrument that sits on the surface of Mars and can pick up seismic events hundreds or even thousands of miles away. Since its deployment, the mission has recorded 733 distinct marsquakes, about 35 of which were used for the current work. All quakes registered between magnitudes 3 and 4.