explain the concept of shadow zone
Answers
Answer:
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 by the liquid core.
Explanation:
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Answer:
A seismic shadow zone is defined as the region of the earth's surface where the seismographs are not able to detect the seismic waves that propagated through the interior of the earth. During an earthquake, these waves originates from the focus and radiates out in a spherical manner. The P waves are the primary waves which gets refracted by the outer core (liquid) inside the earth and are not traceable between 104° and 140° from the location of the epicenter. Again, The S waves are the considered to be the secondary waves which gets consumed at the core mantle boundary as S waves can travel only in solid. As a result of which it forms a shadow zone that is not detectable more than 104° from the epicenter location.
This is how the seismic shadow zones are formed.