Physics – Geophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmdi43a1944f&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #DI43A-1944
Physics
Geophysics
[0925] Exploration Geophysics / Magnetic And Electrical Methods, [0994] Exploration Geophysics / Instruments And Techniques, [5430] Planetary Sciences: Solid Surface Planets / Interiors, [6250] Planetary Sciences: Solar System Objects / Moon
Scientific paper
Electromagnetic (EM) sounding is a geophysical method that is used to detect the subsurface properties of both the near-surface and deep interior of planetary bodies. In the magnetotelluric (MT) method, the orthogonal components of the horizontal electric and magnetic fields on the surface are used to discern the conductivity structure at depths of tens of meters to hundreds of kilometers. On the terrestrial planets, electromagnetic discharges (lightning) or magnetic field variations due to interactions with the solar wind can provide MT source signals. On airless bodies such as the Moon, solar wind turbulence and other plasma waves can create source signals. The Moon spends about 3/4 of its orbit in the solar wind and 1/4 in Earth's magnetosphere, and thus encounters a wide variety of electromagnetic source signals over a broad range of frequencies. With a simple detector on the surface of the Moon, MT would be a powerful tool to probe the internal structure of both deep and shallow features. In this presentation, we describe ongoing work under a LASER program to assess the EM environment at the Moon as it applies to MT soundings, as a step toward understanding the depth and resolution that could be obtained from these measurements on future missions.
Delory Gregory T.
Fillingim Matthew O.
Grimm Robert E.
Halekas Jasper S.
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