Why do bands indicating magnetic reversals appear to be of similar width on both sides of a mis ocean ridge?

The similar width of magnetic reversal bands on both sides of a mid-ocean ridge is due to the symmetrical process of seafloor spreading. As magma rises and cools at the ridge, it records the Earth's magnetic field orientation at that time. The consistent rate of seafloor spreading on either side of the ridge ensures that the width of these bands is uniform, reflecting the periodic nature of magnetic reversals. Thus, the bands form parallel patterns that mirror each other across the ridge.