Where is the highest rate of heat flow escaping the Earth's interior?

Question

Quizplus · Accepted Answer

At mid-ocean ridges, heat is escaping through the process of seafloor spreading, where new oceanic crust is formed from magma rising up from the mantle. This leads to a high rate of heat flow due to the proximity of the hot magma to the surface. At subduction zones, heat is also released as denser oceanic crust sinks beneath less dense continental crust, but the rate of heat flow is not as high as at mid-ocean ridges. Volcanoes and mountain ranges are surface features that result from tectonic activity and do not necessarily indicate a high rate of heat flow from the Earth's interior.

Where Is the Highest Rate of Heat Flow Escaping the Earth's