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,
This Is What the Truth Feels Like Tour already collaborated on the singles "Let Me Blow Ya Mind" and "Rich Girl". This setlist was obtained from the July 12, 2016, concert, held at the Xfinity Center in Mansfield, Massachusetts. It does not represent all concerts for the duration of the tour. This Is What the Truth Feels Like Tour The This Is What the Truth Feels Like Tour was the third solo concert tour by American singer-songwriter Gwen Stefani, in support of her third solo studio album, "This Is What the Truth Feels Like" (2016). It began on July 12, 2016, in Mansfield, Massachusetts at the Xfinity Center