Question

What is an earthquake?why do we hear about earthquake in the news,
only once in a while?

Answer 1

Answer:

An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. ... The word tremor is also used for non-earthquake seismic rumbling.

The low rumbling noise at the beginning is P waves and the S waves' arrival is the big bang you hear. Hellweg: “Earthquakes do produce sounds, and people do hear them.