Question

what is seismometer ? ​

Answer 1

Answer:

A seismometer is an instrument that responds to ground motions, such as caused by earthquakes, volcanic eruptions, and explosions.

Step-by-step explanation:

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Answer 2

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A seismometers is a device that is sensitive to vibration. It works on the principle of a pendulum; a heavy inert mass with a certain resistance to movement (inetria) due to its weight is suspended from a frame by a spring that allows movement. The energy from any seismic activity excites this "proof mass" as it is called by geographysicists , making it vibrate.