Answer:

When an earthquake occurs, the shockwaves of released energy that shake the Earth and temporarily turn soft deposits, such as clay, into jelly (liquefaction) are called seismic waves, from the Greek ‘seismos’ meaning ‘earthquake’. Seismic waves are usually generated by movements of the Earth’s tectonic plates but may also be caused by explosions, volcanoes and landslides.

Answer:

1.Seismic waves tell us that the Earth's interior consists of a series of concentric shells,

2.With a thin outer crust, a mantle, a liquid outer core, and a solid inner core. P waves,

3.Meaning primary waves, travel fastest and thus arrive first at seismic stations.

4.The S, or secondary, waves arrive after the P waves.

Explanation:

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