Table of Contents
What is P wave shadow zone and what causes it?
Answer and Explanation: The p wave shadow zone is caused by the refraction of the p waves as they travel through the earth from one medium to another. P waves are known as body waves, which are seismic waves that travel through the interior of the earth.
Why P wave has shadow zone?
P waves do travel through liquids, so they can make it through the liquid part of the core. Because of the refraction that takes place at the CMB, waves that travel through the core are bent away from the surface, and this creates a P wave shadow zone on either side, from 103° to 150°.
What causes the P wave shadow zone quizlet?
Why is there a P-wave shadow zone? The P-wave shadow zone is the result of the refraction effects P-waves go through as they travel deep inside the Earth. It extends from 105 to 142 degrees.
Why cant P waves reach the shadow zone?
The shadow zone is the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves. The shadow zone results from S waves being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core.
Do P waves have shadow zones?
What is true of the P wave shadow zone shown here quizlet?
What is true of the P-wave shadow zone, shown here? It results from the lower velocity of P-waves in the outer core. Beneath the continents, seismic velocities in the mantle increase with depth because the mantle becomes. A) less rigid.
Why is S wave shadow zone much bigger than P wave shadow zone?
P-wave shadow zones are formed due to refraction, which causes the waves to deviate away. But S-wave shadow zones are created because these waves are completely blocked. Thus the S-wave shadow zones are much larger.
What causes the P wave shadow zone on Earth?
The p wave shadow zone is caused by the refraction of the p waves as they travel through the earth from one medium to another. P waves are known as… See full answer below.
When was the seismic wave shadow zone discovered?
Through measuring how P and S waves travel through the earth and out the other side, a seismic wave shadow zone was discovered in about 1910. From the lack of S waves and a great slowing of the P wave velocity (by about 40%) it was deduced that the outer core is made of liquid.
What happens in the Shadow Zone of an earthquake?
shadow zone The shadow zone is the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves. The shadow zone results from S waves being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core.
What are the properties of a P wave?
Properties of the P wave 1 It is the first wave that is recorded in seismograph at the time of the earthquake 2 These are compression waves. 3 It can move through liquids and solids and gas easily. 4 They shake medium in direction of propagation 5 In the homogeneous and isotropic solids, the P wave moves in a straight line.