Although heat from the center of the Earth is migrating to the surface everywhere, the heat is concentrated at the edges of tectonic plates. Tectonic plates are pieces of the Earth's surface that fit together like a jigsaw puzzle and move around slowly, about as fast as your fingernails grow. These plates can grind up against each other, or slip under each other, so their edges are very hot and are considered dynamic places. In fact, the edges of tectonic plates are marked by lots of earthquakes, like in California, and volcanoes, like in Japan.
For example, the edge of the Pacific Plate is called the Ring of Fire, because of the especially high number of earthquakes and volcanoes that occur there. The western United States is a part of the Ring of Fire, so more heat is brought to the Earth's surface in states like Nevada and California. That is where you will find all of the current geothermal power plants in the U.S.

License information: CC BY 4.0
MPAA: G
Go to source: https://kids.frontiersin.org/article/10.3389/frym.2019.00105