An S wave is slower than a P wave and only moves through solid rock. Rock breaking along a fault line release the energy stored in the rocks when the rocks break due to pressure inside the Earth creating primary waves that are also known as compression waves. Earthquakes produce shockwaves called seismic waves. They shake the ground back and forth – like a Slinky – in their travel direction, but do little damage as they only move buildings up and down. Scientists use at least three reporting stations to calculate the exact point where the earthquake originated. P waves, though easier to record, are significantly smaller and do not cause as much damage because they compress particles in only one direction. He has been featured on multiple film blogs and has worked in the film industry. The shadow zone of P-waves appears as a band around the earth between 105 ° and 145 ° away from the epicenter. The waves are refracted as they travel through the Earth due to a change in density of the medium. P waves are energy waves that cause rock particles inside the earth to expand and contract like the slinky in the picture as they move through the body of the Earth. Robert Godard began writing in 2007 for various creative blogs and academic publications. Geologist Francis Birch discovered a relationship between the velocity of P waves and the density of the material the waves are traveling in: This article is on the type of seismic wave. Terms in this set (4) P waves. To understand P waves, we have to first look into the basics of seismology and seismic waves. Check out Myrna Martin's award winning textbooks, e-books, videos and rock sets. The S waves are the second wave to reach a seismic station measuring a disturbance. S waves, or secondary waves, are the second waves to arrive during an earthquake. In the case of earthquakes that have occurred at global distances, three or more geographically diverse observing stations (using a common clock) recording P-wave arrivals permits the computation of a unique time and location on the planet for the event. They travel through the Earth’s interior and can pass through both solid and molten rock. S waves and P waves are known as body waves because they travel through the body of the Earth. They are much slower than P waves and can travel only through solids. S waves cannot pass through the liquid outer core, but P waves can. The effectiveness of advance warning depends on accurate detection of the P-waves and rejection of ground vibrations caused by local activity (such as trucks or construction). in history. Lines on seismograms show the motion in the Earth as the waves travel to and from the reporting station. Waves. 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