Scientists Baffled to Find Signs of Another Core Within Earth’s Inner Core, Say ‘We Have to Rewrite the Textbooks’ For ...

The S wave shadow zone is the area of the Earth’s surface where S waves are not detected following an earthquake ... From the diagram, we can see the region where S waves are not detected.

These plates move slowly, but can cause earthquakes and volcanoes where they meet. The seismic waves produced by an earthquake are monitored and tracked. The Earth is almost a sphere. These are ...