Focusing on soil liquefaction, the seismic records during the Niigata-ken earthquake in 1964, the southern Hyogo prefecture earthquake in 1995 and the 2011 off the Pacific coast of Tohoku earthquake are analyzed by the non-stationary Fourier spectra. The shift of dominant frequency in the seismic record of Kawagishi-cho during the Niigata-ken earthquake is evaluated based on the time-variant pr...

Seismic attenuation was estimated from compressional (P) and shear (S) waves carefully extracted three-component vertical seismic profiling (VSP) data. A high sensitivity of to fluid content noticed, which shows the advantage its use as a attribute for reservoir studies. Contrary most observations in fully saturated sandstones, magnitude P S wave studied carbonate zones is higher than one. This...

We use multi-channel analysis of surface waves (MASW) on seismic data in an attempt to test data acquisition parameters and compare those results to reaffirm existing general theoretical recommendations and rules of thumb. Of particular interest were optimum seismic receiver spread size, minimum and maximum receiver offsets and dominant geophone frequency for best-case fundamentalmode dispersio...

We present a method for estimating seismic attenuation based on frequency shift data. In most natural materials, seismic attenuation increases with frequency. The high-frequency components of the seismic signal are attenuated more rapidly than the low-frequency components as waves propagate. As a result, the centroid of the signal’s spectrum experiences a downshift during propagation. Under the...

Further Reading Geankoplis CJ (1993) Transport Processes and Unit Operations. New Jersey: PTR Prentice Hall. King CJ (1980) Separation Processes. New York:McGrawHill. Kister HZ (1992) Distillation Design. New York: McGraw-Hill. Seader JD and Henley EJ (1998) Separation Process Principles. New York: John Wiley. Stichlmair JG and Fair JR (1998)Distillation Principles and Practice. New York: Wiley...

Clive R. McMahon, Barry W. Brook, Neil Collier and Corey J. A. Bradshaw* School for Environmental Research, Institute of Advanced Studies, Charles Darwin University, Darwin, NT 0909, Australia; The Environmental Institute and School of Earth Environmental Sciences, University of Adelaide, Adelaide, SA 5005, Australia; and South Australian Research and Development Institute, P.O. Box 120, Henley...

Heavy economic losses and human casualties caused by destructive earthquakes around the world clearly show the need for a systematic approach for large scale damage detection of various types of existing structures. That could provide the proper means for the decision makers for any rehabilitation plans. The aim of this study is to present an innovative method for investigating the seismic vuln...

The refraction inverse problem was initially investigated by Herglotz (1907), Bateman (1910), and Wiechert and Geiger (1910) who applied Abel transforms for the inversion of seismic travel-times in radially varying media. For smoothly varying media in the absence of low velocity zones, this formulation provides an inverse solution which includes ray bending. In the presence of low velocity zone...

In case of porous fluid-saturated medium the Biot’s poroelasticity theory predicts a movement of the pore fluid relative to the skeleton on seismic wave propagation through the medium. This phenomenon opens an opportunity for investigation of the flow properties of the hydrocarbon-saturated reservoirs. It is well known that relative fluid movement becomes negligible at seismic frequencies if po...

We use very precise frequencies of low-degree solar-oscillation modes measured from 4752 days of data collected by the Birmingham Solar-Oscillations Network (BiSON) to derive seismic information on the solar core. We compare these observations to results from a large Monte Carlo simulation of standard solar models, and use the results to constrain the mean molecular weight of the solar core, an...