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Amateur seismograph construction

Seismographs are instruments designed to detect and measure vibrations within the earth, and the records they produce are known as seismograms. Like the many other terms beginning with this prefix, these words derive from the Greek seismos, meaning "shock" or "earthquake. A seismograph consists of a pendulum mounted on a support base. The pendulum in turn is connected to a recorder, such as an ink pen. When the ground vibrates, the pendulum remains still while the recorder moves, thus creating a record of the earth's movement.
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Seismometer - Wikipedia

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How can I make my own seismometer?

This site began as a simple page that displayed the near-real-time response of a local Huntsville amateur-built seismograph to regional or remote earthquake activity. Viewers of this single seismicity page, while observing the seismograph's current display of local Huntsville, Alabama seismic activity or indications of recent earthquake events, were also interested in looking at recordings of past events, viewing pictures of typical amateur seismograph equipment, and talking about other aspects of this rather unique hobby. So a more complete website was developed, including earthquake data and several seismology-related pages, with an aim to convey additional information, the several areas of what has turned out to be a most rewarding hobby. Research was begun into earthquakes and amateur seismology in the s with many trips to the local library to read old issues of the Scientific American Magazine and the "Amateur Scientist" articles printed there.
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A "seismograph" can be thought of as having three parts: 1 The seismometer , which senses earth motion, usually producing a weak electrical output. Or more recently, a computer which stores, displays, and analyzes the digitized seismometer output, which incorporates time signals from GPS accurate to 0. A one day a good day in the s recording of several distant earthquakes.
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