A seismic array has been deployed at the Sanford Underground Research Facility in the former Homestake mine, South Dakota, to study the underground seismic environment. This includes exploring the advantages of constructing a third-generation gravitational-wave detector underground. A major noise source for these detectors would be Newtonian noise, which is induced by fluctuations in the local ...

In reflection seismology one places sources and receivers on the Earth’s surface. The source generates elastic waves in the subsurface, that are reflected where the medium properties, stiffness and density, vary discontinuously. In the field, often, there are obstructions to collect seismic data for all source-receiver pairs desirable or needed for data processing and application of inverse sca...

Seismic recordings represent convolution of a source wavelet with physical properties of the Earth’s interior, thus different components of the seismic recordings (e.g. traveltime of seismic phases, amplitudes and seismic waveforms) can be used to image structures and compositions of the Earth (e.g. Iyer and Hirahara, 1993; Nolet, 2008; Romanowicz, 2003; Stein and Wysession, 2002). By using dif...

Seismic imaging has many applications in civil engineering, risk hazard, waste storage monitoring, oil exploration and tectonophysics. Among the different seismic imaging methods the full waveform inversion aims to exploit the full information content of seismic data through the complete resolution of the partial differential wave equation. Once the wave equation has been solved for each seismi...

Abstract The present study aimed to characterize the properties of a laser-generated seismic source for laboratory-scale geophysical experiments. This consisted generating waves in aluminum blocks and carbonate core via pulsed-laser impacts measuring wave-field displacement laser vibrometry. experimental data were quantitatively compared both theoretical predictions 2D/3D numerical simulations ...

In the last years, large effort has been done to carry out multi-channel seismic reflection surveys (MCS) in SW Iberia to locate the active tectonic structures that could be related to the generation of the 1755 Lisbon earthquake and the tsunami. The outcome of these researches led to the identification of a large, compressive tectonic structure, named Marquês de Pombal thrust that, alone can a...

Diierencing of time-dependent seismic monitor surveys requires that datasets are collected and processed consistently. Inconsistencies can result in data diierence noise great enough to obscure any reservoir changes. Inversion applied to each dataset may account for some of these inconsistencies. As an example, if the shape, temporal location, or radiation pattern of the seismic energy source i...