Initial Global Mmapping of the Lunar Magnetic Anomaly by MAP-LMAG on SELENE (KAGUYA): Implication for the Lunar Crustal Magnetism

Details Initial Global Mmapping of the Lunar Magnetic Anomaly by MAP-LMAG on SELENE (KAGUYA): Implication for the Lunar Crustal Magnetism Initial Global Mmapping of the Lunar Magnetic Anomaly by MAP-LMAG on SELENE (KAGUYA): Implication for the Lunar Crustal Magnetism

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p31b1398t&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P31B-1398

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5440 Magnetic Fields And Magnetism

Scientific paper

The magnetic field around the Moon has been successfully observed at a nominal altitude of 100 km by the lunar magnetometer (MAP-LMAG) on the SELENE (KAGUYA) spacecraft in a polar orbit since October 29, 2007. Here we report the initial global mapping of the lunar magnetic anomaly based on the observations during November 2007 to June 2008. Since the solar activity has been very low during the observation, an effect of the external field fluctuation is small enough to detect a weak signal of the lunar magnetic anomalies at ~100 km altitude. Distinctly identified are several anomalies: the Descartes anomaly, the Stöfler anomaly, the Crisium antipode anomaly and the Serenitatis antipode anomaly. However other magnetic anomalies observed at lower altitudes by the Lunar Prospector spacecraft are less clearly or hardly recognized in the present mapping result. Hence there is a significant difference in altitude dependence of the magnitude among the lunar magnetic anomalies, in particular, for the anomaly clusters at the northern edge of the South Pole-Aitken basin. This indicates that anomaly sources in the lunar crust have considerably different configurations such as depth and horizontal inhomogeneity of magnetization.

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