Seismic waves are vibrations that carry energy away from an earthquake, explosion or other sudden source. Their speed and path depend on the elastic properties and density of the material they travel through.
What the science says
Body waves move through Earth's interior. P waves compress and expand material in the direction of travel and can move through solids and fluids. S waves move material perpendicular to their direction of travel and cannot propagate through liquids.
How the process works
Surface waves travel along Earth's exterior and often produce large ground motion during earthquakes. Love waves move the ground mainly side to side, while Rayleigh waves produce a rolling motion with both vertical and horizontal components.
What scientists measure
Seismometers record wave arrival times and amplitudes. By comparing P and S arrivals at many stations, scientists locate earthquakes and infer structures inside Earth. The absence or bending of certain waves revealed major internal layers, including the liquid outer core.
Limits and open questions
Seismic waves are therefore both a hazard and a scientific probe. Understanding how they interact with local geology also helps engineers estimate shaking expected at buildings, bridges and other infrastructure.
Why this topic matters
Understanding What Are Seismic Waves helps connect individual observations to the larger scientific framework. Reliable explanations separate measured evidence from speculation, make uncertainty visible, and give readers a basis for interpreting new research as it appears.
