Reduced scale physical modelling is a useful intermediate step to fill the gap between field measurements and numerical simulations. In many different areas of seismology, multicomponent measurements are now commonly recorded and processed. However, up to now, laboratory facilities providing flexible and accurate reproduction of large multicomponent seismic experiments have not reached maturity…

The equation that relates pressure, temperature and volume and is described by parameters that are function of temperature at 1 bar (hereafter called thermal equation of state, TEOS), has practical computational advantages for petrological and geophysical applications over the equation that considers explicitly a thermal pressure. Some considerations that justify the use of the TEOS are discuss…

It was established over a decade ago that the normal modes of the Earth are continuously excited at times without large earthquakes, but the sources of the ‘seismic hum’ have remained unresolved. In addition to the normal modes of the Earth, we show spectral lines in seismic data with frequencies which correspond closely to normal modes of the Sun. Moreover, the widths of the low-frequency …

Several studies have focused on the role of damage zone (DZ) on the hydromechanical behaviour of faults by assuming a fractured DZ (i.e. low stiffness/high permeability). Yet, this vision may not be valid in all geological settings, in particular, in high-porosity reservoirs as targeted by several underground exploitations. We investigate the impact of a high-stiff/low permeable DZ on the shear…

Interferometric synthetic aperture radar (InSAR) technology provides a valuable tool for obtaining Earth surface deformation and topography at high spatial resolution for crustal deformation studies. Similar to global positioning system (GPS), InSAR measurements are affected by the Earth’s ionospheric and tropospheric layers as the electromagnetic signals significantly refract while propagati…

Tahun Terbit

1989

ISBN/ISSN

24-00-023-4

Deskripsi Fisik

249p.; ilus.; 24 cm.

No. Panggil

512/LIP/t

We develop a newformalism to treat nuclear many-body systems using the bare nucleon–nucleon interaction. It has become evident that the tensor interaction plays an important role in nuclear many-body systems due to the role of the pion in strongly interacting systems. We take the antisymmetrized molecular dynamics (AMD) as a basic framework and add a tensor correlation operator acting on the …

In contrast to non-relativistic approaches, 3Dmesh calculations with a relativistic energy density functional have metwith difficulties because of the challenges of variational collapse and fermion doubling.We overcome these difficulties by developing a novel method based on the ideas of the Wilson fermion as well as the variational principle for the inverse Hamiltonian.We demonstrate the appl…

In this study, we demonstrate the application of 3-D isotropic elastic full waveform inversion (FWI) to a field data set from the Sleipner area in the North sea. The field data set consists of a narrow azimuth marine towed streamer survey. The limited maximum offset of less than 2000m poses strong challenges for the FWI technique, due to the lack of wide-angle wave phenomena, particularly for t…

We propose a new duality relation between codimension-two space-like surfaces in gravitational theories and quantum states in dual Hilbert spaces. This surface/state correspondence largely generalizes the idea of holography such that we do not need to rely on the existence of boundaries in gravitational spacetimes. The present idea is motivated by the recent interpretation of anti-de Sitter sp…