Thread: Seriousness What Heats the Earth's Core?
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Old 10-02-2010, 08:35 PM   #5
Salgueiros
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Quote:
Originally Posted by kennyc View Post
I do know there is a lot of work in Iceland to tap into the thermal emissions (as they sit on the mid-Atlantic ridge and have a lot of hotsprings etc.) I know some research is going on ... maybe we need to fund more...
I don't know if they are doing any additional work, but i know that Iceland gets ALL electrical energy it uses from geothermal sources combined with hydroelectrical power since a long time ago. I could personally verify that.

They also have all household heating requirements covered by geothermal energy.

i can think of three reasons for the core being hot
(1) heat from when the planet formed and accreted, which has not yet been lost;
(2) frictional heating, caused by denser core material sinking to the center of the planet; and
(3) heat from the decay of radioactive elements.
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