Answer:
What are the 2 subtypes of P waves?
Body waves are of two types: compressional or primary (P) waves and shear or secondary (S) waves. P- and S- waves are called "body waves" because they can travel through the interior of a body such as the Earth's inner layers, from the focus of an earthquake to distant points on the surface.
P and S waves together are sometimes called body waves because they can travel through the body of the earth, and are not trapped near the surface.
Body waves travel through the interior of the earth. There are two types of body waves: P-waves and S-waves.
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P-Waves.
P-waves travel through materials with rigidity and/or compressiblity, and density
greater rigidity faster P-waves
greater compressibility faster P-waves
greater density slower P-waves
The speed at which seismic waves travel depends on the properties of the material that they are passing through. ... P waves can travel through liquid and solids and gases, while S waves only travel through solids. Scientists use this information to help them determine the structure of Earth.
P-waves are compression waves that apply a force in the direction of propagation. ... On the other hand, S-waves are shear waves, which means that the motion of the medium is perpendicular to the direction of propagation of the wave. The energy is thus less easily transmitted through the medium, and S-waves are slower.
Because the earth's mantle becomes more rigid and compressible as the depth below the asthenosphere increases, P-waves travel faster as they go deeper in the mantle. The density of the mantle also increases with depth below the asthenosphere. The higher density reduces the speed of seismic waves.
The waves also travel through the Earth at different speeds. The fastest wave, called the “P” (primary) wave, arrives first and it usually registers a sharp jolt. ... “It feels more abrupt, but it attenuates very quickly, so if you are far away you often won't feel the P wave.
Explanation:
