GEOLOGY

Detailed explanation-1: -seismograph, instrument that makes a record of seismic waves caused by an earthquake, explosion, or other Earth-shaking phenomenon.

Detailed explanation-2: -Seismographs are instruments used to record the motion of the ground during an earthquake. They are installed in the ground throughout the world and operated as part of a seismographic network.

Detailed explanation-3: -Earthquake detection. A seismogram is a record of the ground motions caused by seismic waves from an earthquake. A seismograph or seismometer is the measuring instrument that creates the seismogram.

Detailed explanation-4: -A device called a seismograph can be used to measure the magnitude of any earthquake.

Detailed explanation-5: -Earthquake is measured by a device called seismometer.