Love waves
What direction do S waves move?
S waves shake the ground in a shearing, or crosswise, motion that is perpendicular to the direction of travel . These are the shake waves that move the ground up and down or from side to side. S waves are called secondary waves because they always arrive after P waves at seismic recording stations.
Do S waves move side to side?
S-wave : The S-wave (secondary, shear, or side-to-side wave) is slower than the P wave and arrives next, shaking the ground up and down and back and forth perpendicular to the direction it is traveling. Shear waves travel at 3.8 kilometers (2.4 miles) per second.
What motion do S waves move?
S waves shake the ground in a shearing, or crosswise, motion that is perpendicular to the direction of travel . These are the shake waves that move the ground up and down or from side to side. S waves are called secondary waves because they always arrive after P waves at seismic recording stations.
Do S waves travel horizontally?
S waves, or secondary waves, are the waves directly following the P waves. As they move, S waves shear, or cut the rock they travel through sideways at right angles to the direction of motion .
What are 4 types of seismic waves?
- Body Waves – Primary (P) & Secondary (S) Waves.
- Surface Waves – Rayleigh & Love Waves.
Which wave causes the most damage to buildings?
Love waves
Which is faster S or P waves?
P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives after the P wave.
What does S in S wave stand for?
The S in S-waves stands for secondary , because they are the second-fastest seismic waves and the second type to be detected once an earthquake has occurred.
Why are there no P waves or S waves?
Because they are deflected by the earth’s core , P waves are not seen in the so-called shadow-zone. The slowest body waves are secondary, or “S” waves. S waves are elastic shear waves that move material sideways, at right angles to their direction of travel.
Why do S-waves can’t travel in liquid?
S-waves cannot travel through liquids. When they reach the surface they cause horizontal shaking . Liquids don’t have any shear strength and so a shear wave cannot propagate through a liquid. Think of a solid material, like a rock.
What is the slowest type of waves?
The slowest (and latest to arrive on seismograms) are surface waves , such as the L wave. L waves are named for the Cambridge mathematician A.E.H. Love who first described them. The surface waves are generally the largest recorded from an earthquake.
Why do S wave travel in solid only?
S-waves are shear waves, which move particles perpendicular to their direction of propagation. They can propagate through solid rocks because these rocks have enough shear strength . The shear strength is one of the forces that hold the rock together, preventing it from falling into pieces. Liquids lack shear strength.
Where do seismic waves travel slowest and fastest?
There are two types of body waves: P-waves travel fastest and through solids, liquids, and gases ; S-waves only travel through solids. Surface waves are the slowest, but they do the most damage in an earthquake.
What can you say about the P-waves and S-waves in the illustration?
S waves travel by particles trying to slide past each other similar to when one shakes a rope up and down or from side to side. ... P waves can travel through solid and fluid materials, S waves can only travel through solids. P waves travel faster than S waves.
What is the difference between S-waves and P-waves?
P waves are recorded earlier than S waves , because they travel at a higher velocity. ... 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.
