EVERYDAY SCIENCE

Detailed explanation-1: -A seismograph is the primary earthquake measuring instrument. The seismograph produces a digital graphic recording of the ground motion caused by the seismic waves . The digital recording is called a seismogram. A network of worldwide seismographs detects and measures the strength and duration of the earthquake’s waves.

Detailed explanation-2: -A seismometer is the internal part of the seismograph, which may be a pendulum or a mass mounted on a spring; however, it is often used synonymously with “seismograph". Seismographs are instruments used to record the motion of the ground during an earthquake.

Detailed explanation-3: -Mercalli scale is used to measure the intensity of an earthquake while Richter Scale is used to measure the magnitude scale of an earthquake. Richter Scale measurements are denoted from 0-10.

Detailed explanation-4: -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. The earliest “seismoscope” was invented by the Chinese philosopher Chang Heng in A.D. 132.

Detailed explanation-5: -’Richter scale’ and ‘Mercalli scale’ are the instruments to measure and record the magnitude and the intensity of an earthquake respectively.