The shadow zone separates P waves that have reached the surface through the mantle from P waves that have reached the surface after passing through both the mantle and the core?

The shadow zone is a specific region on Earth's surface where P waves from earthquakes are not detected. This occurs because P waves are refracted or absorbed by the outer core, creating a gap in seismic wave detection between 105 and 140 degrees from the earthquake epicenter. P waves that pass through the mantle only can be detected beyond this shadow zone, while those that pass through both the mantle and core are detected closer to the epicenter.