Seismograph meaning

sīz'mə-grăf'
An instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake.
noun
5
2
An instrument that automatically detects and records the intensity, direction and duration of earthquakes and similar events.
noun
5
2
The definition of a seismograph is a measuring instrument for earthquakes that tracks duration and magnitude.

A device used to measure the duration and magnitude of a San Francisco earthquake is an example of a seismograph.

noun
5
3
An instrument that records the intensity and duration of earthquakes and similar tremors.
noun
4
3
An instrument that detects and records vibrations and movements in the Earth, especially during an earthquake. Most seismographs employ a pendulum mounted within a rigid framework and connected to a mechanical, optical, or electromagnetic recording device. When the Earth vibrates or shakes, inertia keeps the pendulum steady with respect to the movements of the frame, producing a graphic record of the duration and intensity of the Earth's movements. Separate instruments are needed to record the north-south horizontal, east-west horizontal, and vertical components of a tremor. By comparing the records produced by seismographs located in three or more locations across the Earth, the location and strength of an earthquake can be determined.
3
3
Advertisement

Origin of seismograph

  • From seismo- +"Ž -graph.
    From Wiktionary