http://www.ck12.org Chapter 2. Numbers, Not Adjectives
Other places in the world have more promising hot dry rocks. There’s a good study (Massachusetts Institute of
Technology, 2006) describing the USA’s hot dry rock resource. Another more speculative approach, researched by
Sandia National Laboratories in the 1970s, is to drill all the way down to magma at temperatures of 600− 1300 ◦C,
perhaps 15 km deep, and get power there. The website http://www.magma-power.com reckons that the heat in pools of
magma under the US would cover US energy consumption for 500 or 5000 years, and that it could be extracted
economically.
Southampton Geothermal District Heating Scheme.www.southampton.gov.uk.