Scientists in Iceland drilled straight into 900°C magma by accident — so energy-dense was the well that resulted, it could produce nearly ten times the power of a conventional geothermal well

By Daniel Moran – Space Daily

In 2009 a drill crew in northeast Iceland went looking for very hot water and hit something that was still moving.

They were working at Krafla, a volcanic caldera about ten kilometres wide in one of the most active corners of Iceland. The plan was straightforward on paper: drill down more than four kilometres to reach water so hot and so compressed that it stops behaving like a liquid or a gas, a state scientists call supercritical.