What instrument measure the intensity of earthquakes?

Answer 1

Strong-motion seismometers (which are also known as Accelerographs) are used to measure the intensity of earthquakes. It should be noted that intensity is different from magnitude and is measured using a differing scale (Moddified Mercalli or Macroseismic scale for intensity vs Moment Magnitude scale for earthquake magnitudes.)

Seismometers / accelerometers measure the intensity of earthquakes.

Seismometers - instruments that measure motions of the ground.

The visual output, either on a monitor or on paper is called a seismograph

Seismometers are in part used to measure the intensity of earthquakes. The scale used to measure earthquake intensity is known as the Modified Mercalli scale. A variation of this is used in Europe and is known as the Macroseismic scale.

Earthquakes are measured with a seismometer.

Seismometers and accelerometers are used to measure the acceleration of the ground surface and the total amplitude of seismic waves during an earthquake.

These values are used by seismologists to find the intensity of the earthquake (along with observations of the damage done to structures).

Earthquakes are measured using machines called SEISMOMETERS which record the shaking as waves on a graph .

The magnitude of most earthquakes is measured on the Richter scale, invented by Charles F. Richter in 1934. The Richter magnitude is calculated from the amplitude of the largest seismic wave recorded for the earthquake, no matter what type of wave was the strongest.