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Related articles:
Seismology
Pendulum
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Seismic wave
Key terms: mass motion measure seismometer frame seismograph instruments hz coil loop seismic earthquake designs magnetic frequency pendulum damping vertical sensitive hinge pier amateurs locate wires zhang milne fault imaging oscillate detect sensors shaking acceleration seismology friction once per broadband ground motion magnetic field long period relative to the frame observatories strong motion horizontal pendulum nearly motionless early seismometers geologic seismographs modern instruments use negative feedback loop pacific northwest seismograph network Search external links cited by footnotes on Wikipedia page Seismometer: |
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