Imposing a constraint of the sound-speed profile determined from helioseismology and updating the microphysics, we have revised our seismic solar model, constructed with the assumption of a homogeneous metal abundance distribution, and have shown that the theoretically expected neutrino fluxes are still significantly more than the observations. With the same sound-speed profile constraint, we a...

This paper deals with seismic signal processing. We propose a new algorithm which performs the dispersion filter estimation using a linear array of geophones. This estimation enables a robust characterization and extraction of the dispersive propagating waves from a seismic profile. The novelty of our method is the use of a simultaneous time delay and phase shift correction in order to estimate...

We have detected a continuous seismic signal near 2.08 Hz using data from a portable seismic array, 1280 km long, deployed in Siberia and Mongolia. The signal can be observed on almost all the stations along the profile. The amplitude and the frequency of the signal show a clear daily cycle, and their temporal variations are similar at different stations, suggesting that the signals observed at...

In this dissertation, I investigate the assembly and evolution of the Archean cratonic lithosphere by using two complementary seismological methods to image the lithospheric structure of the Slave craton in Canada. First, I perform surface wave tomographic inversions to constrain the depth dependence of Rayleigh wave phase velocity, shear wave velocity, and azimuthal anisotropy of the Slave cra...

We present the theory and numerical results for interferometrically interpolating and extrapolating ocean bottom seismic (OBS) and surface seismic profile (SSP) data. For the interpolation of OBS data we use the combination of a natural Green’s function (i.e. OBS shot gather) and a model-based Green’s function for the water-layer model. Results show that the aliased OBS data with 80 meter geoph...

The Earth's core is mostly an Fe-Ni alloy with a fraction of light elements (~10 wt%, mainly O, S and Si). Accumulation of these light elements under the core-mantle boundary (CMB) may lead to chemical stratification. Seismic observations have been presented both for and against the stratification in the topmost region of the outer core. Here we investigate the structure under the CMB using dif...

Zoom to upper 400 m (near-surface sound channel) Numerical modelling of sound propagation is an essential tool to assess the potential risk of air-gun shots on marine mammals and derive exposure zone radii within which certain hearing thresholds are exceeded. Here, the results of a detailed 2.5D finite-difference (FD) modelling study are presented, which takes the sound velocity profile of the ...

The assessment of the seismic vulnerability of all school buildings located at Chorrillos and Barranco districts in Lima, the capital city of Peru, was conducted using the Rapid Visual Screening procedure of ATC-21. A total of 28 school buildings were evaluated in Barranco, and 80 in Chorrillos, comprising all kindergarten, primary, and secondary school buildings existing in these two districts...

[1] PS converted waves observed near Ancona on the Adriatic coast of central Italy, as revealed by teleseismic receiver functions (RFs), vary with earthquake backazimuth and epicentral distance in a manner consistent with a 1-D anisotropic seismic structure. Using reflectivity calculations, we develop a profile of anisotropic seismic velocity through the Adriatic lithosphere at this locality. W...

A geothermal power plant projected in Unterhaching, south of Munich/Germany, will generate 3.36 MW of electrical power. Two boreholes (doublet) have developed the karstified Malm at a depth of approx. 3000 m. Available seismic profiles were reprocessed with the aim of interpreting the facies and thus the degree of karstification within the Malm. The most prospective areas are, beside fault zone...