Whats the cause of the shadow zone between 105 degrees and 140 degrees?
what happens to the path of a P wave that just enters the outer liquid core. The P wave slows down (the rigidity G is 0.0) and the wave is deflected towards the center of the Earth. From 105 to 140 degrees from the epicenter no P waves are recorded. This creates a belt from 105 to 140 around the Earth called the P Wave Shadow Zone. Although it is not illustrated think what would happen to an S wave that just entered the outer liquid core. S waves can not travel through a liquid so from 105 to 105 degrees on either side of the epicenter no S waves are recorded. This is the S Wave Shadow Zone. In the interval 105 to 140 degrees from the epicenter ….. P waves are not observed S waves are not observed Neither P waves nor S waves are observed Neither P waves nor S waves nor Surface waves are observed In the interval 140 degrees to 140 degrees from the epicenter …..
