GEOLOGY

Detailed explanation-1: -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-2: -A seismograph is a machine which measures an earthquake.

Detailed explanation-3: -The spring-suspended mass lags behind the motion caused by the earthquake, making the pen record the waves on the drum. This combination of instruments tells a seismologist the general direction of the seismic wave source, the magnitude at its source, and the character of the wave motion.

Detailed explanation-4: -A seismograph, or seismometer, is an instrument used to detect and record seismic waves. Seismic waves are propagating vibrations that carry energy from the source of an earthquake outward in all directions. They travel through the interior of the Earth and can be measured with sensitive detectors called seismographs.

Detailed explanation-5: -A seismograph is an instrument that measures and registers seismic waves that travel through the Earth as the outcome of an earthquake.