The upward flow of ancient heat to the Earth's surface is measured in tens of milliwatts per square metre; the flow from the Sun above is measured in hundreds of watts per square metre.
The Earth's surface experiences a continuous upward flow of ancient heat, quantified at tens of milliwatts per square meter. This geothermal energy serves as a small but notable source of heat, contributing to the planet's overall thermal balance. Such subterranean heat arises from radioactive decay and residual heat from the Earth's formation.
In stark contrast, the energy received from the Sun is significantly more powerful, reaching hundreds of watts per square meter. This immense solar energy drives weather patterns, influences climates, and supports life on Earth. The disparity between these two heat sources highlights the Sun's dominance in powering the planet, overshadowing the relatively minor geothermal contribution.
