Seismology Links Earthquake Seismology II Introduction Seismology is the study of the passage of elastic waves through the earth.
Earthquake seismology is the best tool to study the interior of the earth.
When an earthquake or explosion occurs, part of the energy released is as elastic waves that are transmitted through the earth. The waves are then detected and recorded by seismograms , which measure, amplify and record the motion of the ground. The information is then used to determine earthquake locations, the subsurface structures and etc. This pendulum-mounted seismograph records horizontal motion. The mass is coupled to the Earth by means of a pendulum and a pivot is attached to a rod to constrain the mass to move in the horizontal direction only.