Question

what is an earthquake how it is measured​

Answer 1

Earthquake is a natural.disater which destroys the lives on the earth.It is recorded with the help of seismograph

Answer 2

An earthquake is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to toss people around and destroy whole cities....

The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake.