As a geophysicist with expertise in seismology, I can provide you with information on the different types of seismic waves and their speeds. Seismic waves are indeed vibrations that travel through the Earth and are generated by events such as earthquakes. There are three primary types of seismic waves: P-waves, S-waves, and surface waves. P-waves, or primary waves, are the fastest and the first to be detected by seismographs. They are compressional waves that can travel through both solid and liquid layers of the Earth. S-waves, or secondary waves, are slower than P-waves and can only travel through solids. They are shear waves that move the ground in a direction perpendicular to the direction of the wave's travel. Surface waves, which include Love waves and Rayleigh waves, are the slowest of the seismic waves and are only present near the Earth's surface. They cause the most damage during an earthquake because they lose energy more slowly than P- or S-waves as they travel through the Earth's crust. read more >>

Seismic wave�� A vibrational disturbance in the Earth that travels at speeds of several kilometers per second. There are three main types of seismic waves in the earth: P (fastest), S (slower), and Surface waves (slowest). Seismic waves are produced by earthquakes.read more >>