Accession Number : AD0841041

Title :   LONG-PERIOD TRIAXIAL SEISMOGRAPH DEVELOPMENT.

Descriptive Note : Quarterly rept. no. 8, 1 Apr-30 Jun 68,

Corporate Author : GEOTECH GARLAND TX

Personal Author(s) : Andrew, D. B. ; Kirkpatrick, B. M.

Report Date : 23 JUL 1968

Pagination or Media Count : 33

Abstract : Field operation of the long-period triaxial seismograph at the Unita Basin Seismological Observatory (UBSO) continued through April and May when the seismometer was removed for installation in another borehole facility. Test results that show the stability of operational parameters are given. Operational improvement over the advanced long-period system in the presence of wind and barometric pressure noise is illustrated. Redesign of an improved triaxial module is completed. Design details concerning new subassemblies to improve seismometer reliability are discussed and illustrated. (Author)

Descriptors :   (*SEISMOLOGICAL STATIONS, SEISMOMETERS), (*UNDERGROUND EXPLOSIONS, DETECTION), SEISMOMETERS, WIND, SEISMIC WAVES, INSTRUMENTATION, CALIBRATION, NOISE, ATTENUATION, STABILITY, BAROMETRIC PRESSURE, NUCLEAR EXPLOSIONS, RESPONSE, EARTHQUAKES, NETWORKS.

Subject Categories : Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE