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WRRCTR No.6 Instrumentation for Seismic Exploration for Ground Water in Hawaii

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Title:WRRCTR No.6 Instrumentation for Seismic Exploration for Ground Water in Hawaii
Authors:Palmer, Leonard A.
LC Subject Headings:Groundwater -- Hawaii.
Seismic prospecting -- Hawaii.
Seismological research -- Hawaii.
Seismology -- Instruments -- Hawaii.
Date Issued:Apr 1967
Publisher:Water Resources Research Center, University of Hawaii at Manoa
Citation:Palmer LA. 1967. Instrumentation for seismic exploration for ground water in Hawaii. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 6.
Series:WRRC Technical Report
Abstract:This study developed instrumentation and techniques to be used for seismic exploration of groundwater in Hawaii. A three-stage field test of instruments and methods was conducted to determine their
capability of recording and reproducing seismic data. Reproducibility was the main criterion to permit using certain signal analysis techniques. Multichannel explosive tests utilizing dynamite shots were carried
out in Waimanalo, Oahu during the first stage of testing. The second stage was the use of a two-channel magnetic tape recorder
converted to receive voice and up-hole geophone signals on one channel and seismic signals on the other channel. Stage three tested the use of a "thumper" acoustical source, seismic filters, and timers developed for the project. The signals generated by explosives and recorded photographically were very reproducible, but this is a relatively expensive method and
analysis is slow. Seismic data recorded on magnetic tape allows versatility in analysis of recorded signals reproduced either in wiggle or intensity contrast analog form. Sections can be selected for digital computer
analysis. The findings from this pilot phase of seismic exploration for groundwater does not indicate that seismology would not be an appropriate tool for studying geological structure. Success in further work will be
implemented by this preliminary work in solving instrumentation problems and the number of personnel of the Water Resources Research Center and the Hawaii Institute of Geophysics who have been trained.
Pages/Duration:v + 26 pages
Appears in Collections: WRRC Technical Reports

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