Energy in South Australia and trap in the deeper heat. Due to the low permeability of granite, the hot rocks must undergo hydraulic fracturing and be stimulated to allow a flow of water through the system to produce energy. This heat is slowly conducted to shallower rocks near the surface. Petratherm propose developing the geothermal energy in the more permeable sedimentary rocks that overlay the hot granite, a process called Heat Exchange Within Insulator (HEWI). While somewhat cooler, in many cases they do not require hydraulic fracturing. It is estimated that one percent of geothermal energy shallower than five kilometres below the earth's surface
Notes from the Underground (Hollywood Undead album) Notes from the Underground (Hollywood Undead album) Notes from the Underground is the third studio album by American rap rock band Hollywood Undead. Originally set to release in Summer 2012, "Notes from the Underground" was released on January 8, 2013 in the United States and Canada. The album charted at No. 2 on the Billboard 200 with over 53,000 copies sold in its first week, making it their highest charting album to date, despite its predecessor "American Tragedy" selling around 67,000 copies in its first week. The album has spawned a generally positive reception. Following extensive touring throughout 2011 to