Accession Number : AD0850352
Title : Application of a Vertical Strain Seismograph to the Enhancement of P Waves.
Descriptive Note : Technical rept.,
Corporate Author : GEOTECH GARLAND TX
Personal Author(s) : Shopland, Robert C. ; Kirklin, Richard H.
Report Date : 12 MAR 1969
Pagination or Media Count : 41
Abstract : Enhancement of P waves is obtained by the suppression of microseisms with a combination of vertical linear strain seismograph and vertical inertial seismograph outputs. Significant suppression is observed at sites where the predominant microseisms consist of essentially single-mode Rayleigh waves in contrast to that observed at a site where the microseismic noise is compositionally more complex. A description is given of the vertical linear strain seismograph used in these investigations. Consideration is given to the use of a vertical transverse strain seismograph at sites where the microseismic noise field is complex. (Author)
Descriptors : (*SEISMOLOGICAL STATIONS, NOISE), (*UNDERGROUND EXPLOSIONS, DETECTION), MICROSEISMS, POWER SPECTRA, SEISMOMETERS, PHASE STUDIES, AMPLITUDE MODULATION, NUCLEAR EXPLOSIONS, RESPONSE, SEISMIC WAVES, FREQUENCY, RAYLEIGH WAVES, EARTHQUAKES, RECORDING SYSTEMS, OKLAHOMA.
Subject Categories : Seismology
Seismic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE