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Record Details

Record 90 of 2717
Induced and permanent magnetism on the moon - Structural and evolutionary implications.
Author and Affiliation:
Sonett, C. P.
Dyal, P.
Colburn, D. S.
Mihalov, J. D.
Parkin, C. W.(NASA Ames Research Center, Moffett Field, Calif., United States)
Smith, B. F.
Schubert, G.(California, University, Los Angeles, Calif., United States)
Schwartz, K.(American Nucleonics Corp., Woodland Hills, Calif., United States)
Abstract: It is shown that the moon possesses an extraordinary response to induction from the solar wind due to a combination of a high interior electrical conductivity together with a relatively resistive crustal layer into which the solar wind dynamic pressure forces back the induced field. The dark side response, devoid of solar wind pressure, is approximately that expected for the vacuum case. These data permit an assessment of the interior conductivity and an estimate of the thermal gradient in the crustal region. The discovery of a large permanent magnetic field at the Apollo 12 site corresponds approximately to the paleomagnetic residues discovered in both Apollo 11 and 12 rock samples. The implications regarding an early lunar magnetic field are discussed and it is shown that among the various conjectures regarding the early field the most prominent are either an interior dynamo or an early approach to the earth though no extant model is free of difficulties.
Publication Date: Jan 01, 1971
Document ID:
19720029443
(Acquired Dec 04, 1995)
Accession Number: 72A13109
Subject Category: SPACE SCIENCES
Document Type: Conference Proceedings
Publication Information: (SEE A72-13101 03-30)
Publisher Information: Netherlands
Meeting Information: Highlights of astronomy. Volume 2 - International Astronomical Union, General Assembly; 14th; August 18-27, 1970; Brighton
Financial Sponsor: NASA; Unknown
Description: 16p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: DYNAMIC PRESSURE; LUNAR MAGNETIC FIELDS; MAGNETIC PROPERTIES; PRESSURE EFFECTS; SOLAR WIND; APOLLO FLIGHTS; CONFERENCES; DYNAMO THEORY; ELECTRICAL RESISTIVITY; LUNAR CRUST; LUNAR EVOLUTION; MAGNETIC INDUCTION; TEMPERATURE GRADIENTS
Imprint And Other Notes: In: Highlights of astronomy. Volume 2 - International Astronomical Union, General Assembly, 14th, Brighton, England, August 18-27, 1970, Proceedings. (A72-13101 03-30) Dordrecht, D. Reidel Publishing Co., 1971, p. 173-188.
Availability Source: Other Sources
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