Apollo moon rocks reveal lunar magnetic field was briefly stronger than Earth's

Researchers from the Department of Earth Sciences, University of Oxford, have resolved a long-standing debate about the strength of the moon's magnetic field. For decades, scientists have argued about whether the moon had a strong or weak magnetic field during its early history (3.5-4 billion years ago). Now a new analysis, published in Nature Geoscience, shows that both sides of the debate are effectively correct.