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Report on some experimental long-period seismographs

Gilman, Ralph (1960) Report on some experimental long-period seismographs. Bulletin of the Seismological Society of America, 50 (4). pp. 553-559. ISSN 0037-1106.

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The unexpected usefulness in research of the Press-Ewing seismograph system (Press, Ewing and Lehner, 1958) has stimulated further efforts to obtain even higher seismograph sensitivity in the period range beyond 100 sec. A major difficulty has been in maintaining pendulum stability at long periods. This paper describes a stable long-period seismometer and gives results from several seismograph systems incorporating long-period pendulums and galvanometers.

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Additional Information:Copyright © 1960, by the Seismological Society of America. Manuscript received for publication March 17, 1960. The author is grateful to Dr. Frank Press for guidance and encouragement in carrying out these experiments. Mr. J. L. Blayney designed and built the displacement transducer.
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Caltech Division of Geological Sciences974
Issue or Number:4
Record Number:CaltechAUTHORS:20140801-144909820
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47832
Deposited By: George Porter
Deposited On:01 Aug 2014 21:56
Last Modified:03 Oct 2019 06:57

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