Question

In the past, the intensity of the earth's magnetic field was: greater weaker same evidence is inconclusive

Answer 1

It's the same it never changes ever

Answer 2

Permanent magnetism is lost when a substance is heated above a temperature known as the Curie point, and all but twenty-five miles of the crust is believed to be above the Curie point.The measured magnetism of the crustal rocks indicates that they do not supply nearly enough field strength to account for what we have.