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IRIS Earthquake Science

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horizontal seismograph

Vertical Seismograph

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Cambridge Volcano Seismology

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SCIENCECORNERINDIA

DIY Horizontal pendulum seismometer

Vertical Seismogram Animation

Vertical Seismograph

IRIS Earthquake Science

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Marco Schinelli

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Seismometer Vertical Motion

John Jay Science

What's on a seismogram? Horizontal Seismometer Motions