The upper lithospheric structure from the Pilbara Craton, across the Capricorn Orogen, to the northern Yilgarn Craton is determined from high-fidelity broadband seismic data. Three-component temporary stations were deployed in a line running southwards from Marble Bar, Western Australia, at approximately 118 E longitude. They were in position between July and October 2000. Receiver functions ar...

Now that the world has well and truly crossed the threshold to the 21st century, it seems timely to review the progress of lithospheric seismic imaging and comment on recent developments in the field. In the context of this special issue, lithospheric seismic imaging refers to any kind of seismic study that gives rise to multidimensional (2-D or 3-D) views of the Earth's interior, from the shal...

-The internal properties within and adjacent to fault zones are reviewed, principally on the basis of laboratory, borehole, and seismic refraction and reflection data. The deformation of rocks by faulting ranges from intragrain microcracking to severe alteration. Saturated microcracked and mildly fractured rocks do not exhibit a significant reduction in velocity, but, from borehole measurements...

shear-wave velocity ( ) is an important parameter used for site characterization in geotechnical engineering. however, dispersion curve inversion is challenging for most inversion methods due to its high non-linearity and mix-determined trait. in order to overcome these problems, in this study, a joint inversion strategy is proposed based on the particle swarm optimization (pso) algorithm. the ...

Seismic methods were used to locate an impermeable water barrier (density body), constructed in front of a homogenous earth-fill dam (Prätisbach) in Eastern Styria, Austria. This detention reservoir, built in 1985/86, was constructed of locally mined materials. Key to this structures functionality is its impermeable core located within the upstream toe of the dam and parallel to the dam axis. T...

This report presents the final results from this contract to analyze the seismicity of the Yakima Fold and Thrust Belt (YFTB) region, Washington (Figure 1). The contract work involved the following: Apply conventional seismic tomography, using the public domain code simul2000 (Thurber and Eberhart-Phillips, 1999), to the YFTB region (121.25°W to 117.5°W and 45.5°N to 47.5°N) dataset of approxim...

This paper explores the possibility of using genetic algorithms to invert seismic refraction travel time data for a two-dimensional velocity structure. The problem is usually high-dimensional, non-linear and multi-modal. Our chromosome is encoded as a two-dimensional real number array. Binary tournament selection, two-point crossover and block mutation directed by prior geological knowledge are...

The Ries Crater was formed about 12 million years ago, 120 km northwest of Munich in the district of Donau-Ries. The crater is estimated to have had a diameter of approximately 24 kilometers. In this report we discuss the preand post-impact structure of the crater site, and in particular try to investigate whether or not the Ries Crater shows evidence of structural uplift, a characteristic of m...