File:Seismograph recording vibrations.jpg
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Seismograph_recording_vibrations.jpg (200 × 243 pixels, file size: 29 KB, MIME type: image/jpeg)
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DescriptionSeismograph recording vibrations.jpg |
English: seismograph records vibrations transmitted at the ground level of an historic building. The instrument is wired to a light and siren designed to warn the excavation crew that vibration levels are approaching preset limits. Additional sensors are often installed in the basement and on sensitive features such as stained glass windows. |
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Date | Unknown date | ||||
Source | http://www.nps.gov/hps/tps/technotes/PTN42/monitor.htm | ||||
Author | Wilson, Ihrig & Associates, Inc. | ||||
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current | 15:43, 20 April 2010 | 200 × 243 (29 KB) | Preservapedia (talk | contribs) | {{Information |Description={{en|1= seismograph records vibrations transmitted at the ground level of an historic building. The instrument is wired to a light and siren designed to warn the excavation crew that vibration levels are approaching preset limit |
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