[Southack]

The core of the Earth has been cooling by some miniscule amount every year for the past 4 Billion or more years.

There’s less energy available in the core than before.

While there may be peaks and valleys, the overall graph of volcanic activity must trend downward.

[GOPJ]

The core of the Earth has been cooling by some miniscule amount every year for the past 4 Billion or more years. There’s less energy available in the core than before. While there may be peaks and valleys, the overall graph of volcanic activity must trend downward.

Would that be by an imperceptible amount every hundred years?