Alaskan Noise Field Investigation, March to June 1971
TELEDYNE GEOTECH GARLAND TX
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Noise in the 50-60 second period range, recorded by the Alaskan Long- Period Array during the winter months, was found to be caused by convection cells within the array boreholes. A technique for preventing formation of the cells was devised. Burial of ALPA seismometers was found to significantly reduce wind-generated horizontal seismic noise. Relationships between triaxial module pressure sensitivities and module installation techniques and between pressure sensitivity and module tilt were studied.