GEOLOGY

Detailed explanation-1: -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-2: -The Richter scale is a logarithmic scale, meaning that the numbers on the scale measure factors of 10. See more pictures of natural disasters. A seismograph is the device that scientists use to measure earthquakes. The goal of a seismograph is to accurately record the motion of the ground during a quake.

Detailed explanation-3: -Seismic waves travel through and around the Earth and can be recorded with seismometers.

Detailed explanation-4: -A seismograph is a machine which measures an earthquake.