| 21. | Despite the simpler design, the seismometer was sensitive enough to detect Neil Armstrong's movements during sleep.
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| 22. | At tidal frequencies, gravitational acceleration was measured by monitoring the feedback current used to center the seismometer mass.
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| 23. | And it wasn't because Erich Lenz was changing the paper on the seismometer drums when the quake hit.
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| 24. | The depth of the earthquake prompted scientists in South America to install seismometer networks focused on long-period earthquakes.
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| 25. | Finally, a seismometer built by the University of Hawaii was lowered into position nearby and plugged into the junction box.
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| 26. | With inexpensive seismometer designs and internet access, amateurs and small institutions have even formed a " public seismograph network ."
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| 27. | A piece of paper is wrapped around a rotating drum of the helicorder which receives the seismic signal from a seismometer.
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| 28. | These impacts provided impulses that were recorded by the seismometer network to yield information about the geological structure of the Moon.
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| 29. | The event affected a number of health care facilities in Veterans Administration to install seismometer s at its high-risk sites.
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| 30. | I am guessing that it was a blast measurement device such as a seismometer, but don't know what kind.
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