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Magnetism and the interior of the moonDuring the time period 1961-1972 eleven magnetometers were sent to the moon. The results of lunar magnetometer data analysis are reviewed, with emphasis on the lunar interior. Magnetic fields have been measured on the lunar surface at the Apollo 12, 14, 15, and 16 landing sites. The remanent field values at these sites are given. Satellite and surface measurements show strong evidence that the lunar crust is magnetized over much of the lunar globe. The origin of the lunar remanent field is not yet satisfactorily understood; several source models are presented. Simultaneous data from the Apollo 12 lunar surface magnetometer and the Explorer 35 Ames magnetometer are used to construct a wholemoon hysteresis curve, from which the global lunar permeability is determined. Total iron abundance is calculated for two assumed compositional models of the lunar interior. Other lunar models with a small iron core and with a shallow iron-rich layer are also discussed in light of the measured global permeability.
Document ID
19740018181
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Dyal, P. (NASA Ames Research Center Moffett Field, CA, United States)
Parkin, C. W. (Santa Clara Univ.)
Daily, W. D. (Brigham Young Univ.)
Date Acquired
September 3, 2013
Publication Date
January 1, 1974
Subject Category
Space Sciences
Report/Patent Number
NASA-TM-X-70082
Report Number: NASA-TM-X-70082
Accession Number
74N26294
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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