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www.dictionary.com/browse/seismograph

Seismograph definition, any of various instruments for measuring and recording the vibrations of earthquakes. See more.

www.merriam-webster.com/dictionary/seismograph

Seismograph definition is - an apparatus to measure and record vibrations within the earth and of the ground.

www.thefreedictionary.com/seismograph

Define seismograph. seismograph synonyms, seismograph pronunciation, seismograph translation, English dictionary definition of seismograph. n. An instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake....

study.com/academy/lesson/what-is-a-seismograph-definition-history-facts.html

The First Seismograph. The history of the seismograph is a long one. It dates all the way back to ancient China. A Chinese mathematician named Chang Heng invented and constructed the first ...

www.britannica.com/science/seismograph

The first true seismograph, according to Italian seismologists, was created in 1875 by Italian physicist Filippo Cecchi. The Cecchi seismograph also used pendulums, but it was the first to record the relative motion of the pendulums with respect to Earth’s ground motions as a function of time.

www.vocabulary.com/dictionary/seismograph

seismograph: 1 n a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake) Type of: measuring device , measuring instrument , measuring system instrument that shows the extent or amount or quantity or degree of something

en.wikipedia.org/wiki/Seismometer

A seismometer is an instrument that responds to ground motions, such as caused by earthquakes, volcanic eruptions, and explosions. Seismometers are usually combined with a timing device and a recording device to form a seismograph. The output of such a device—formerly recorded on paper (see picture) or film, now recorded and processed digitally—is a seismogram.

www.dictionary.com/browse/seismography

Seismography definition, the scientific measuring and recording of the shock and vibrations of earthquakes. See more.

dictionary.cambridge.org/dictionary/english/seismograph

seismograph definition: 1. a piece of equipment that measures and records the strength of an earthquake 2. a piece of equipment which measures and records the strength of an earthquake (= sudden movement of the earth's surface). Learn more.

en.wikipedia.org/wiki/Seismogram

A seismogram is a graph output by a seismograph.It is a record of the ground motion at a measuring station as a function of time. Seismograms typically record motions in three cartesian axes (x, y, and z), with the z axis perpendicular to the Earth's surface and the x- and y- axes parallel to the surface.