Noise Power Spectral Density and Coherency Estimates at Sites in Nevada, USA: Mina, Excelsior Mountains, Gabbs Valleys, Garfield (GAR) Seismic Stations, and East of Garfield

摘要

Noise was analyzed for displacement power spectral density (PSD) in decibels (dB) referenced to units of nanometers (nm)2/Hertz (Hz) from noise time series acquired in 1997, days 216-224, in the state of Nevada, USA, at MINA seismic stations, GABBS Valleys, Excelsior Mountains, GAR seismic stations, and nearby to the east of GAR seismic stations. The noise surveys at MINA seismic stations and GABBS Valleys were conducted by the Allied Signal Technical Services Corp. with four sites at each location. The noise survey to the east of GAR seismic stations composed of four sites and at the Excelsior Mountains near MINA composed of two sites were conducted by the Lawrence Livermore National Laboratory (LLNL). The Southern Methodist University (SMU) conducted the noise surveys at the existing locations of GAR seismic stations. Allied Signal employed the Teledyne Geotech GS-13 seismometer and the RDAS-200P digitizer for their noise survey. The LLNL and the SMU used the GS-13 and the REFTEK digitizer.