[time-nuts] Morion MV89A position

Hal Murray hmurray at megapathdsl.net
Thu Jan 30 09:16:58 UTC 2014


> In the 70's I did a 4 inch pipe 20 feet in the ground in Dallas.
> Temperature was better than 0.1 C. 

Over what time period?  Dry ground or wet?  How deep is your water table?  ...

Temperature in the ground is a skin-depth problem.  Lower frequencies will go 
deeper.

Next time somebody digs a hole like that, it would be fun to put a string of 
thermometers in it.


Goodies from google:
  http://www.builditsolar.com/Projects/Cooling/EarthTemperatures.htm
  http://topex.ucsd.edu/geodynamics/HW3_2011_presentations/C_wine_cellar.pdf

-- 
These are my opinions.  I hate spam.






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