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dc.contributor.author Joziasse, Cornelius en_US
dc.contributor.author Adams, William M en_US
dc.date.accessioned 2009-04-02T01:43:04Z en_US
dc.date.available 2009-04-02T01:43:04Z en_US
dc.date.issued 1967-08 en_US
dc.identifier.citation Joziasse C, Adams WM. 1967. Some seismic techniques for mapping small scale shallow structures. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 11. en_US
dc.identifier.uri http://hdl.handle.net/10125/7426 en_US
dc.description.abstract Seismic recording and playback techniques and equipment are being developed for use in mapping small scale geologic structures of significance in controlling the movement of ground water. High-frequency seismic waves produced by weight-dropping, or thumping, are used to provide the necessary resolution to detect these small structures. A vibrator has been constructed as another source of high frequency seismic energy. A DC motor is the transducer with storage batteries providing the power. A four-channel tape recorder is used to obtain seismic records on a l0-foot spacing. This spacing gives good correlation from record to record. A storage oscilloscope gives visual displays of seismic data as wiggly line playbacks which are stored on the screen and then photographed. Also being used is variable intensity playback of reflection records. This allows signal averaging to be done optically and gives an easily interpreted display. A seismic survey done in the Waimanalo area on Oahu, Hawaii indicates that the thumper can produce sufficient amounts of high frequency energy to permit shallow reflection prospecting. en_US
dc.description.sponsorship U.S. Department of the Interior Grant/Contract No. 14-01-0001-1011; B-005-HI en_US
dc.format.extent v + 15 pages en_US
dc.language.iso en-US en_US
dc.publisher Water Resources Research Center, University of Hawaii at Manoa en_US
dc.relation.ispartofseries WRRC Technical Report en_US
dc.relation.ispartofseries 11 en_US
dc.subject.lcsh Geology -- Hawaii -- Oahu. en_US
dc.subject.lcsh Seismic prospecting -- Hawaii -- Oahu. en_US
dc.subject.lcsh Seismological research -- Hawaii -- Oahu. en_US
dc.subject.lcsh Waimanalo (Hawaii) en_US
dc.title WRRCTR No.11 Some Seismic Techniques for Mapping Small Scale Shallow Structures en_US
dc.type Report en_US
dc.type.dcmi Text en_US

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