Earth Heat Flow

Earth heat flow refers to the transfer of heat from the planet’s interior to its surface. This heat originates from the planet’s formation, radioactive decay of elements inside Earth, and other processes. As heat moves outward, it drives geological activity like volcanic eruptions, earthquakes, and plate tectonics. The average heat flow at Earth's surface is about 87 milliwatts per square meter, but it varies by location. Understanding heat flow helps scientists learn about Earth's internal structure, thermal history, and the dynamics shaping our planet over time.