as depicted in the above image there is a slight seasonal temperature variation of around 8 F when at the 12 ft depth.

and the variation increases as you move into the shallower depths , 5 ft , 2 ft , surface.

this is why I posted the 55 F - 65 F temperature range in my earlier post.

this is also why people are building there survival shelters underground , and underground shelter that is watertight is protected from the environment , saves the environment after it has already been destroyed and becomes a tornado , hurricane , nuclear blast shelter
all in one slick move.

take a gander at this bloaks dugout

http://www.youtube.com/watch?v=n6D2Hpvu_lw&feature=related

24 C all year long.
no heating or cooling bills.
















3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.