An elastic wave in the earth produced by an earthquake or other means.
Answer:
(c) in some parts of its orbit it is much closer to the Sun than in other.
Sun moon and earth are barely ever aligned.
Answer:
<em>Seismic Gap</em>
Explanation:
Seismic Gap<em> is a kind of an active fault that has not suffered with any of the significant earth-quaked from a long duration of time.
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And Seismic Gap is the lack of large as well as big earthquakes in a particular place with a tectonic front. It is also an active fault which generally becomes the reason for other earthquakes.
