Magnetic Field Reversal

Magnetic Field Reversal

Magnetic field reversal is a natural process where Earth’s magnetic poles switch places—north becomes south, and south becomes north. This doesn’t happen suddenly but over thousands of years. Scientists have discovered evidence of past reversals by studying the magnetic patterns in volcanic rocks a...

Did you know that Earth’s magnetic field has flipped many times in the past? This means that the north and south magnetic poles have swapped places.

But how do we know this has happened? Scientists have discovered that rocks on the ocean floor hold clues. As magma erupts at mid-ocean ridges, it cools and hardens into rock.

These rock...