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seismograph

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.04 sec.
seismograph
an instrument that registers and records the features of earthquakes. A seismogram is the record from such an instrument

seismograph [′sīz·mə‚graf]
(engineering)
An instrument that records vibrations in the earth, especially earthquakes.


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Geological Survey, a seismograph in Gottingen, Germany, that had recorded the 1906 San Francisco earthquake also measured the Loma Prieta Earthquake that struck San Francisco in 1989; it measured 7.
The scientists were studying the volcano and actually standing in its crater at the time of the eruption; their leader Stanley Williams had totally missed the clear signs on the seismograph showing that an eruption was imminent.
Learn more about the history of seismographs and how scientists measure earthquakes at: www.
 
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