Question

the s-wave shadow zone extends from ____ to 180° angular distance from the earthquake focus on one side
a) 45 degree
b) 105 degree
c) 75 degree
d) 57 degree​

Answer 1

Answer:

(a) 45 degree

Explanation:

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Answer 2

Answer:

105 degree

Explanation:

• The seismic shadow zones are areas on the surface of the earth where seismographs do not record any seismic wave created due to an earthquake activty.  
• Both P and S waves are radiated from the epicenter in all the directions but due to the liquid state of the earth out, S waves do not propogaes beyond an angular distance of 104 degrees. This phenomenon creates a shadow zone of S-wave on the seismographs.
• For P wave the shadow zones ranges from 104 degrees to 143 degrees.