Question

Qr What is a
seismograph? How does it work?​

Answer 1

Explanation:

A seismograph is a device for measuring the movement of the earth, and consists of a ground- motion detection sensor, called a seismometer, coupled with a recording system. Seismographs operate on the principle of inertia. ... Modern research seismometers are electronic, and detect and record motions in all directions.

Answer 2

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Seismograph is an instrument which is used to measure Earthquakes.

How seismograph works

• Seismograph instruments are placed on the surface of the earth so, whenever the ground starts shaking the instrument's case moves.
• There is a seismometer inside the seismograph so,only seismograph instruments case moves while seismometer remains still without any movement.
• Seismograph instruments have a large powerful magnetic system for detection and case is wrapped with numerous coils of wire.
• When an earthquake happens the case moves in relative the magnet move and generates an electric signals to the wire which further sent to the computer to create a seismogram.