seismic

Answer 1

waves

Seismic waves are waves of energy that travel through the Earth's layers, caused by earthquakes, volcanic eruptions, and other seismic events. They are composed of both compressional (P-waves) and shear (S-waves) waves, which move through the Earth at different speeds. Seismic waves can be used to study the Earth's interior structure and composition, as well as to locate and measure the size of earthquakes.