Question

name the instrument used to measure an earthquake ? how it is measured ?​

Answer 1

Answer:

Seismographs

Explanation:

Seismographs are instruments used to record the motion of the ground during an earthquake

Answer 2

Answer:

A seismometer is an instrument that responds to ground noises and shaking such as caused by earthquakes, volcanic eruptions, and explosions. They are usually combined with a timing device and a recording device to form a seismograph. The output of such a device—formerly recorded on paper or film, now recorded and processed digitally—is a seismogram. Such data is used to locate and characterize earthquakes, and to study the Earth's internal structure.