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Mathematics 9 Online
OpenStudy (anonymous):

Easy medal !! What do seismographs record?

OpenStudy (anonymous):

Seismograph record is used to measure the ground movements caused by the seismic waves. It also helps to measure the intensiveness of earthquakes. The rector scale reading of earthquake is measured by meaning the frequency of seismic waves.

OpenStudy (anonymous):

Ground movements caused by waves

OpenStudy (anonymous):

They keep track of earthquakes and different movments

OpenStudy (anonymous):

tada ^

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