Seismic Body-wave Traveltime Tomography Tutorials. Primary waves (P-waves) and secondary waves (S-waves) are the two types of body waves (Figure below). When an elastic body, such as a rock is struck with a blow, two types of elastic waves are produced and these waves travel out from the source. See more. Body waves are of two types: Primary waves (also called P-waves, or pressure waves) and Secondary waves (S-waves, or shear waves). The P in P-waves stands for primary, because these are the fastest seismic waves and are the first to be detected once an earthquake has occurred. P waves, S waves, and Surface waves. Contribute to MIGG-NTU/SeisTomo_Tutorials development by creating an account on GitHub. The main types of seismic waves: P, S, and surface waves Seismic waves can either be body waves or surface waves -- but the full story is far more complex. There are two types of body waves: P-waves and S-waves. Surface waves are responsible for the rolling motions that do most of the damage in an earthquake. Which type of seismic wave arrives after body waves due to the fact that they only travel through crust? Body Waves. Body waves travel through the interior of the Earth. These seismic waves produce a long wave on the seismographs. Although they move even more slowly than S-waves, they can be much larger in amplitude and are often the most destructive type of seismic wave. As their name suggests, surface waves travel just below the surface of the ground. Primary waves B waves Surface waves Transverse waves. Difference between P and S- waves:-We can easily recognize P & S waves on seismograph because the velocity of P- waves is 1.7 times more than the velocity of the S- waves. Body waves move at different speeds through different materials. Surface waves are typically generated when the source of the earthquake is close to the Earth’s surface. P-Waves. Seismic waves are like those ripples which can travel through the inside of the earth, as well as on the surface. Surface wave arrives after body waves due to the fact that they only travel through crust. The types of waves that are useful for understanding Earth’s interior are called body waves, meaning that, unlike the surface waves on the ocean, they are transmitted through Earth materials. Body waves travel through the interior of the earth. Figure 9.1.1 Hitting a large block of rock with a heavy hammer will create seismic waves within the rock. The shaking we experience is the vibration of the elastic rocks by the energy in seismic waves. Based on the medium they travel in, earthquake waves can be classified under two categories: Body waves; Surface waves; Body waves are those waves that travel through the earth. In an earthquake, body waves are responsible for the sharp jolts. 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