Mars has no active magnetic dynamo field today, but it possesses a remanent magnetic field that may reach several thousand nanoteslas locally. There is a wealth of maps and models of the magnetic field [1–4]. Recently InSight (Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport) lander has provided new magnetic field strength and direction measurements. It turned out that the InSight landing site’s magnetic field is ten times stronger than predicted by satellite-based models [5]. This knowledge indicates that the magnetic field of the planet needs further study and analysis.