Seismic waves such as those produced by earthquakes.
The magnitude, Richter scale, and seismograph.
seismometer, also known as a seismograph. which record seismic waves
Here are some sentences.Scientists use a seismograph to measure movement in the earth.The seismograph showed that an earthquake had occurred.
GPS
A seismograph is a machine for measuring and recording parameters relating to the movements of the Earth's surface caused by earthquakes or explosions.
A seismograph is an instrument that measures and records earthquake waves.
well, the sandglass to measure the time. the measuring cups to measure the volume, the seismograph, the ruler, etc.
Seismometers. For information on how seismometers are used, please see the related question.
seismic waves
A seismometer is a seismograph made to measure the direction, intensity, and duration of earthquakes. It does this by measuring the actual movement of the ground.
Seismograph
seismograph