Explanation:

P-waves are fastest waves, they travel through liquid and solid therefore are first to be detected. Earth's core is in liquid state, so it transmits only P-waves and not S-waves.

Surface waves or L-waves are typically generated when the source of the earthquake is close to the Earth’s surface. As their name suggests, surface waves travel just below the surface of the ground. 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. There are several types of surface wave, but the two most common varieties are Rayleigh waves and Love waves.