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Unmanned Spaceflight.com _ Mars _ Mars magnetism

Posted by: alan May 3 2018, 07:25 PM

Mars crustal magnetism as measured by Mars global Surveyor:



I noticed the resemblance of parts of it to satellite tracks, but they are somewhat off center.

So I tried NASA's GISS map projector, and playing a hunch used the antipodes of the Borealis Basin as the center:



Has anyone read anything explaining why the curves they make should be roughly centered at the basin's antipodes?

Posted by: mcaplinger May 3 2018, 07:55 PM

http://www.planetary.org/blogs/emily-lakdawalla/2008/1710.html

Posted by: serpens May 8 2018, 05:50 AM

Alternatively Sprenke and Baker provided a reasonably compelling explanation, taking into account true polar wander. The full paper can be found at Icarus Volume 147 Issue 1 (September 2000). Behind a paywall but a comprehensive abstract is here:

https://www.lpi.usra.edu/meetings/lpsc2000/pdf/1930.pdf

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