What do you mean by sismic shadow zone what is its significance

1.	What do you mean by sismic shadow zone what is its significance
Answer» \tThe shadow zone is the zone of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves.\tThe shadow zone results from P waves being refracted by the liquid core and S waves being stopped completely by the liquid core.\tA zone between 105° and 145° from the\xa0epicenter was recognized as the shadow zone for both the wave types.\tThe entire zone beyond 105° does not receive S-waves.\tThe shadow zone of S-wave is larger than that of the P-waves.\tThe shadow zone of P-waves appears as a band around the earth between 105° and 145° away from the epicenter.

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