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Apollo 12 Magnetometer: Measurement of a Steady Magnetic Field on the Surface of the Moon

Palmer Dyal, Curtis W. Parkin and Charles P. Sonett
Science
New Series, Vol. 169, No. 3947 (Aug. 21, 1970), pp. 762-764
Stable URL: http://www.jstor.org/stable/1729782
Page Count: 3
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Abstract

The Apollo 12 magnetometer has measured a steady magnetic field of 36 ± 5 gammas on the lunar surface. Surface gradient measurements and data from a lunar orbiting satellite indicate that this steady field is localized rather than global in its extent. These data suggest that the source is a large, magnetized body which acquired a field during an epoch in which the inducing field was much stronger than any that presently exists at the moon.

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