ArticleScience advances2026
Moon's farside near-zero paleomagnetic field suggests a global lunar dynamo cessation.
Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Recent paleomagnetic studies of Apollo and Chang'e returned samples suggest that the lunar dynamo was active from ∼4.2 billion years ago (Ga) and ceased by ∼1.0 Ga. However, uncertainties remain regarding the temporal and spatial distribution of the lunar paleomagnetic field, as almost all of the returned samples are from the nearside, except for those returned by Chang'e-6. Here, we present the first paleomagnetic analysis of a lunar meteorite, Northwest Africa 15528, which is a feldspathic regolith breccia likely from the farside of the Moon. Our results not only indicate that it recorded a near-zero magnetic field (below a few hundred nanoteslas) at ∼0.7 Ga but also show that lunar meteorites can provide critical paleomagnetic information. Combined with two young Apollo samples from the nearside, Apollo 15015 (formed at ∼0.9 Ga) and Apollo 15465 (formed at ∼0.5 Ga), our findings suggest the absence of a global dynamo-generated lunar magnetic field for the past one billion years.
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