seis·​mo·​graph | \ˈsīz-mə-ˌgraf, ˈsīs-\

Definition of seismograph 

: an apparatus to measure and record vibrations within the earth and of the ground

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Other Words from seismograph

seismographer \ sīz-​ˈmä-​grə-​fər , sīs-​ \ noun
seismographic \ ˌsīz-​mə-​ˈgra-​fik , ˌsīs-​ \ adjective
seismography \ sīz-​ˈmä-​grə-​fē , sīs-​ \ noun

Examples of seismograph in a Sentence

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The principal instruments on board the spacecraft include the first ever seismographs placed directly on the surface of Mars. Jeffrey Kluger, Time, "NASA's InSight Lander Is About to Give Mars its First Health Checkup in 4.5 Billion Years," 4 May 2018 In 150 years, the soundings of Britons' feelings for the monarchy have fluctuated like a seismograph chart. Patt Morrison,, "After centuries of practice, Britain's royals figure out how to turn a wedding into a global watch party," 17 May 2018 Not so in soloist Paul Jacobs’ magisterial playing of the organ part, which built to a thrilling roar of low pedal sonority in the final pages that must have set off every seismograph in the state. John Von Rhein,, "Violinist Faust, in a brilliant CSO debut, makes convincing case for flawed Schumann rarity," 12 May 2018 Researchers developed formulas to decipher a nuclear explosion’s size — also known as its yield — and its location from the wiggles of a seismograph. Rachel Becker, The Verge, "Meet the scientists keeping a global watch for nuclear explosions," 9 May 2018 Like seismographs, geophones convert ground vibrations into measurable electronic signals, but are smaller, lighter and better suited to field work. Douglas Quenqua,, "Elephants may be dialing long-distance through their feet," 8 May 2018 The Viking seismographs were mounted on top of the spacecraft, which made their readings less-than-entirely reliable. Jeffrey Kluger, Time, "NASA's InSight Lander Is About to Give Mars its First Health Checkup in 4.5 Billion Years," 4 May 2018 In this way, Saturn's rings behave like a seismograph. Carolyn Porco, Scientific American, "Cassini at Saturn: A Retrospective," 1 Oct. 2017 Soon enough, their screens were filled with charts and numbers—reds, yellows, greens—that zigzagged up and down like an E.K.G. or digital seismograph. Nick Bilton, The Hive, "“Threats,” “Ultimatums,” and “Espionage”: Inside Silicon Valley’s Spy Wars," 13 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'seismograph.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of seismograph

1858, in the meaning defined above

History and Etymology for seismograph

International Scientific Vocabulary

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Time Traveler for seismograph

The first known use of seismograph was in 1858

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English Language Learners Definition of seismograph

: a device that measures and records the movement of the earth during an earthquake


seis·​mo·​graph | \ˈsīz-mə-ˌgraf, ˈsīs-\

Kids Definition of seismograph

: a device that measures and records vibrations of the earth

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Spanish Central: Translation of seismograph Encyclopedia article about seismograph

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to clear from alleged fault or guilt

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