Hot dry rock geothermal energy makes use of hot fluids found naturally in basement rock; but such HWR conditions are rare. By far the bulk of the world’s geothermal resource base (over 98%) is in the form of basement rock that is hot but dry—with no naturally available water. This means that HDR technology is applicable almost everywhere on earth (hence the claim that HDR geothermal energy is ubiquitous). Typically, the temperature in those vast regions of the accessible crystalline basement rock increases with depth. This geothermal gradient, which is the principal HDR resource variable, ranges from less than 20 °C/km to over 60 °C/km,
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