Which type of wave can penetrate the outer core?
In a P wave, the rock particles are alternately squished together and pulled apart (called compressions and dilatations), so P waves are also called compressional waves. These waves can travel through solids, liquids, and gases. P waves can travel through the liquid outer core. An S wave is a different beast.
Which type of seismic wave Cannot penetrate the outer core?
The bending of seismic waves is called refraction. 6. Figure 19.2b: S-waves do not travel through the outer core, creating an even bigger shadow zone for S-waves. The fact that S-waves do not travel through the outer core suggests that the latter is liquid.
Can S waves penetrate the inner core?
S-waves cannot pass through liquids, and do not pass through Earth's core because the outer core is liquid.
What are 4 types of seismic waves?
Love Waves—surface waves that move parallel to the Earth's surface and perpendicular to the direction of wave propagation..
- P-wave Motion. P-wave:the primary body wave; the first seismic wave detected by seismographs; able to move through both liquid and solid rock. …
- S-wave Motion. …
- Rayleigh-wave Motion. …
- Love-wave Motion.
What are P waves also known as?
A P wave, or compressional wave, is a seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the direction the wave is moving.
What is P and S waves?
In P or compressional waves, the vibration of the rock is in the direction of propagation. 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.
Why do S waves not pass through the core?
In fact, it is just a matter of rigidity: S-waves need a medium that is rigid enough for them to propagate. This is why S-waves cannot propagate through liquids.
What are P and S waves?
In P or compressional waves, the vibration of the rock is in the direction of propagation. 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.
What can P waves travel through?
P waves travel through solid and liquid, but S waves do not travel through liquid.
What is Rayleigh and Love waves?
Love and Rayleigh waves Some earthquake waves move only along the surface of the earth. Love waves shake the surface side-to-side. Rayleigh waves move the surface of the earth around in a circle, forward and down then back and up. This is the same as the motion in an ocean wave.
What is AP wave and S wave?
In P or compressional waves, the vibration of the rock is in the direction of propagation. 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.
What is Al wave?
noun Geology. an earthquake wave that travels around the earth's surface and is usually the third conspicuous wave to reach a seismograph.
What do P waves travel through?
P waves travel through the fluid layers of the Earth's interior, and yet they are refracted slightly when they pass through the transition between the semisolid mantle and the liquid outer core.
How are P waves and S waves the outer core?
Detailed Description. P-wave and S-wave paths through the earth. Scientists discovered that Earth's outer core is liquid by observing seismic waves. P waves travel through solid and liquid, but S waves do not travel through liquid.
Are Rayleigh waves S waves?
In seismology longitudinal and shear waves are known as P-waves and S-waves, respectively, and are termed body waves. Rayleigh waves are generated by the interaction of P- and S- waves at the surface of the earth, and travel with a velocity that is lower than the P-, S-, and Love wave velocities.
What can Rayleigh waves travel through?
characteristics. …principal surface waves are called Rayleigh waves after the British physicist Lord Rayleigh, who first mathematically demonstrated their existence. Rayleigh waves travel along the free surface of an elastic solid such as the Earth.
What is primary and secondary waves?
Primary (P) and secondary (S) waves are two types of waves caused by earthquakes. They are defined based on when they arrive and are felt on the surface. P waves, or primary waves, arrive first while S waves, or secondary waves, arrive second. Both waves cause the ground to shake when an earthquake occurs.
What are seismic L waves?
The L waves travel along the surface of the earth from the point directly above the quake or epicenter. Love (L) waves are shear waves where the shearing (back and forth) motion, is confined to a horizontal plane at the Earth's surface.
What are the P and S waves?
Primary (P) and secondary (S) waves are two types of waves caused by earthquakes. They are defined based on when they arrive and are felt on the surface. P waves, or primary waves, arrive first while S waves, or secondary waves, arrive second. Both waves cause the ground to shake when an earthquake occurs.
What are P waves S waves and L waves?
The PP (one bounce) and PPP (two bounces) waves travel more slowly than the direct P because they pass through shallower, lower velocity rocks. The different S waves arrive after the P waves. The slowest (and latest to arrive on seismograms) are surface waves, such as the L wave.
Why can’t S wave pass through the outer core?
In fact, it is just a matter of rigidity: S-waves need a medium that is rigid enough for them to propagate. This is why S-waves cannot propagate through liquids.
What is L wave earthquake?
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.
What is the difference between Rayleigh and Love waves?
Love waves have a horizontal motion that moves the surface from side to side perpendicular to the direction the wave is traveling. Of the two surface waves, Love waves move faster. Rayleigh waves cause the ground to shake in an elliptical pattern. This motion is similar to that observed in ocean waves.
Are Rayleigh waves S-waves?
In seismology longitudinal and shear waves are known as P-waves and S-waves, respectively, and are termed body waves. Rayleigh waves are generated by the interaction of P- and S- waves at the surface of the earth, and travel with a velocity that is lower than the P-, S-, and Love wave velocities.
What are secondary seismic waves?
S waves are called secondary waves because they always arrive after P waves at seismic recording stations. Unlike P waves, S waves can travel only through solid materials. After both P and S waves have moved through the body of Earth, they are followed by surface waves, which travel along Earth's surface.
What are Love and Rayleigh waves?
Love and Rayleigh waves Some earthquake waves move only along the surface of the earth. Love waves shake the surface side-to-side. Rayleigh waves move the surface of the earth around in a circle, forward and down then back and up. This is the same as the motion in an ocean wave.
What are P and S and L waves?
The PP (one bounce) and PPP (two bounces) waves travel more slowly than the direct P because they pass through shallower, lower velocity rocks. The different S waves arrive after the P waves. The slowest (and latest to arrive on seismograms) are surface waves, such as the L wave.
What are P and S seismic waves?
There are two types of seismic waves, primary waves and secondary waves. Primary waves, also known as P waves or pressure waves, are longitudinal compression waves similar to the motion of a slinky (SF Fig. 7.1 A). Secondary waves, or S waves, are slower than P waves.
Can surface waves pass through the core?
Body waves can travel through the Earth's inner layers, but surface waves can only move along the surface of the planet like ripples on water.
What are p type and S type seismic waves?
They are called primary waves because they are the first type of wave to arrive at seismic recording stations. P waves can travel through solids, liquids, and even gases. S waves shake the ground in a shearing, or crosswise, motion that is perpendicular to the direction of travel.