Seismometers.
For information on how seismometers are used, please see the related question.
A seismograph.
A Seismograph
Seismographs
A seismometer
seismograph
A seismograph is an instrument used to record vibrations in or on a planet.
One instrument that used to detect Tsunami is a deep ocean tsunami detection buoys.
Amperemeter (or Ammeter)
periotron
seismic waves
A seismograph is located under the ground. When there is an earthquake, the ground shakes, which also shakes the pen on the seismograph, making it move along the paper, drawing lines. To know how strong the earthquake was, scientist can look on the paper. The bigger the lines, the stronger the earthquake was.
A seismograph is used to detect vibrations and motions in the Earth's crust. These tremors are usually due to friction between tectonic plates (earthquakes) or huge powerful volcanic activity. - hope that helps
A seismograph is an instrument used to record vibrations in or on a planet.
A seismoscope is an instrument used to measure vibrations of the earth's crust. Generally, scientists use these readings to predict when an earthquake will strike. They can also use this to measure the length and magnitude of an earthquake.
An electroscope is an instrument used to detect static electricity.
Seismic waves / seismicity.
One instrument that used to detect Tsunami is a deep ocean tsunami detection buoys.
Scientists have sensors that detect vibrations. When two vibrate from the same cause, they hear it at different times, and the difference can be used to triangulate on the epicenter. They can predict it too a little.
seismograph
The explorer is used by the dentist to detect decay.
Seismagraph
Scientists use a recording instrument called a seismograph to detect ground motions caused by seismic waves from earthquakes.