The Central United States Seismic Observatory:Site Characterization
A borehole that penetrated 585 m of soil deposits and terminated 9 m into Paleozoic bedrock was completed near the New Madrid Seismic Zone of the central United States.A vertical array of strong-motion accelerometers and broadband seismometers–the Central United States Seismic Observatory (CUSSO) was installed.CUSSO provides a test site for verification and calibration of seismic-wave propagation analysis and near-surface seismic exploration.Preliminary results show that velocity models produced from the P-wave walkaway soundings,P-wave arrival of earthquake recordings,and downhole P-wave suspension measurements at CUSSO are comparable;however,the S-wave suspension log model underestimates the velocity compared to the models derived from S-wave walkaway soundings and S-wave arrival of earthquake recordings.Significant sediment disturbance in the borehole annulus is speculated to have affected the accuracy of the S-wave suspension log,whereas the saturated condition of the soft sediment at depth made the downhole P-wave measurements less susceptible to the sediment disturbance.
Seismic wave propagation P- and S-wave velocities Vertical seismic array
Zhenming Wang Edward W.Woolery Caibo Hu
Kentucky Geological Survey, University of Kentucky, Lexington, Kentucky, USA Department of Earth and Environmental Sciences, University of Kentucky, Lexington, Kentucky, USA
国际会议
长沙
英文
223-227
2012-06-15（万方平台首次上网日期，不代表论文的发表时间）