How do fracture zones differ from the active parts of transform faults?

The distinction between fracture zones and the active segments of transform faults lies in their seismic activity and plate dynamics.

• Active Transform Faults: These are the segments of a fracture zone located directly between two offset oceanic ridge crests. In these areas, opposing lithospheric plates slide past one another, making them seismically active zones where earthquakes occur.12
• Fracture Zones (Inactive Portions): Beyond the offset ridge crests, the fracture zone consists of inactive "scars" on the ocean floor. Because the seafloor on both sides of the fracture zone in these regions belongs to the same rigid plate and moves in unison, there is no differential movement or seismic activity.12

In essence, while the entire feature is often referred to as a fracture zone, only the portion acting as a boundary between two spreading centers functions as a transform fault, facilitating the transfer of motion between plates.12