The seismic waves produced by an earthquake are monitored and tracked. The Earth is almost a sphere. These are its main layers, starting with the outermost: crust - relatively thin and rocky ...

A schematic diagram of the faulting processes of the 2024 M7.6 Noto Peninsula earthquake sequence. The crustal processes and faults broken during the long-lasting intense earthquake swarm are ...

They travel through the Earth in curved paths, but they change direction suddenly when they pass through the boundary between substances in different states. The diagrams show what happens when P ...