it records the magnitude of earthquakes.
A seismograph is used to measure ground movement or vibrations on the Richter scale.
A seismograph.
Lilly, who is a scientist, used a seismograph to determine the strength of the earthquake that had just hit Haiti.
a seismograph
It is a seismograph
Seismometers. For information on how seismometers are used, please see the related question.
A seismograph.
seismograph
Seismograph
A seismograph is used to measure ground movement or vibrations on the Richter scale.
The correct spelling (transposed) is seismograph(measures and records seismic activity).
seismograph scale
Seismograph.
a seismograph
a seismograph
Lilly, who is a scientist, used a seismograph to determine the strength of the earthquake that had just hit Haiti.
A seismometer (replacing the outdated term seismograph), but other instruments may also respond to an earthquake. The simplest example of a seismograph is a pendulum.