The presence of an S-wave shadow zone implies that the Earth's core is liquid.

Name: The presence of an S-wave shadow zone implies that the Earth's core is liquid.
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The S-wave shadow zone is the area on Earth's surface where S-waves do not arrive or are greatly diminished in amplitude. This is because S-waves cannot pass through the liquid outer core of the Earth. Therefore, the presence of an S-wave shadow zone is evidence that the Earth's core is liquid.

The Presence of an S-Wave Shadow Zone Implies That the Earth's