Solar wind induced field versus radius of orbit. Dashed line: minimum field limit (0.25 μT at 1 AU). Red lines: field amplified by factors (A) between 2 and 16. Yellow region: range of fields capable of magnetizing CV and CM chondrites as magnetic minerals either cool through their Curie temperature or grow through a blocking volume during metasomatism. Blue: CVKaba and CMMurchison are select paleointensity values from the Kaba and Murchison meteorites (see text and Supplementary Information Section 7). Present-day location of planets and asteroid belt shown diagrammatically for reference: Me, Mercury; V, Venus; E, Earth; Ma, Mars; J, Jupiter; S, Saturn; U, Uranus; N, Neptune.