Abstract:An internally generated magnetic field once existed on the Moon. This field reached high intensities (~10-100 μT, perhaps intermittently) from ~4.3-3.6Gyr ago and then weakened to ≲ 5 μT before dissipating by ~1.9-0.8 Gyr ago.While the Moon's metallic core could have generated a magnetic field via a dynamo powered by vigorous convection, models of a core dynamo often fail to explain the observed characteristics of the lunar magnetic field. In particular, the core alone likely may not contain sufficient thermal… Show more
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