may be releasing what was already built up by other processes, and are not the primary cuase of the tremors. Again, you have failed to mention this. Rather than show how significant human activities are, these features prove how insignificant we are. Heat in heat out. I dont understand what you mean by the heat escaping is the same as the heat trying to get in boreholes, I would have thought this was expected naturally. Other points: "a geological agent of unprecedented power" I wish you wouldnt use the term unprecedented so loosely. There is a school of thought, stretching back to the Bible, that believes nothing is unprecedented ('there is nothing new under the sun'), but leaving that particular view aside, humans cannot move continents, are not creating earthquakes on their own beyong mag 6 at best,are not upllifting mountain ranges, are not creating oceans, are not differentiating thousands of kilometres of earths crust and mantle and core, are not creating calderas of tens+ of square kilometres, are not concentrating minerals over thousands of square kilometres of mountains, subduction zones and mid oceanic ridges by heat from plate tectonics, are not altering the earths orbit, are not creating a sun from a previous supernova, etc etc etc. So stop using the word 'unprecedented' so loosely just to enhance your own self-important philosophy of geological socialism. 11 months ago Dino Legovich Researcher (logged in via email @yahoo.com) Roger, I am no expert at climate science(there are so many these days)