Browsing by Subject "Geophysics"
Now showing items 1-15 of 15
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Apparent velocity of acoustic waveforms and geophysical applications
(2013)In the last few decades, theoretical predictions and experimental observations of superluminal electromagnetic phenomena have sparked a lot of interest and resulted in many publications. These phenomena are typically ... -
Characterizing hydraulic parameters in a small-scale tank experiment, using Self-Potential, DC Resistivity and Induced Polarization methods.
(2011)As part of a larger project that is concerned with the characterization of hydraulic parameters from electrical surface measurements, this thesis covers self-potential, DC resistivity and induced polarization measurements ... -
Comparison of the domain-state-corrected multispecimen method with the microwave and Thellier-Thellier methods using historical lavas from La Palma, Spain
(2011)Reliable palaeointensities (PIs) are necessary to determine the full vector variation of Earth’s magnetic field as a function of geological time and hence to provide constraints for geodynamo models. Knowledge of PIs also ... -
Infrasound analysis of I18DK, northwest Greenland
(2010)Within the scope of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), four methods are used to verify the treaty. One of these methods is based on the detection of infrasound waves generated by a nuclear explosion. ... -
Investigating uncertainties in travel time tomography using the null space shuttle
Due to the underdetermined nature of large tomographic inverse problems, a sizable null space exists. It is therefore important to investigate the uncertainties in tomographic models produced by inverse problems with ... -
Joint Inversion of Surface Waves and Ps-converted Waves
(2010)To put constraints on the crustal and upper-mantle structure, seismologists have often made use of the sensitivity of surface wave dispersion observations and teleseismic P-wave receiver functions to the shear velocity ... -
Mars' thermal evolution constrained by the crustal magnetization and volcanic resurfacing: Present-day melting and the disappearance of the global magnetic field explained
(2012)Convection modeling so far failed to explain the thermal state of Mars in view of the observed long-lived volcanism, absence of plate tectonics and the early generation and subsequent cessation of a core magnetic dynamo. ... -
Paleointensity during the Laschamp and Blake geomagnetic excursions
Full vector information of the Earth’s magnetic field on a geological time scale is essential to put constraints on geodynamo models. Excursions of the geomagnetic field show deviating directions and a strong decrease in ... -
Probabilistic Seismic Hazard Assessment for the Southern part of the Netherlands
(2010)Abstract Due to the necessity of a national Annex for the Eurocode 8, safety requirements of engineering structures and public interest in the effect of induced earthquakes, an update of the seismic hazard assessment is ... -
Synthetics and Green's functions for PREM in the Generalized Spherical Harmonic expansion
Realistic laterally heterogeneous Earth models can be obtained by comparing synthetics to measured seismograms and by minimizing their misfit through iteratively optimizing the model parameters until a satisfactory match ... -
The nature of the Pamir subduction zone derived from stress field modelling
(2013)In this thesis a new approach is tested to determine the nature of the subduction processes occurring in the Pamir orogen. The occurrence of subduction underneath the central Pamir Mountains, located on the eastern border ... -
Thermal hydrological modeling of the effect of fault zones intersecting primary porous media and the implications for enhancing Geothermal exploration potential at shallower depths
(2012)For geothermal energy exploration, depth to required fluid temperature and potential extraction rates are important factors for economical viability. Local thermal anomalies found in boreholes might be associated with ...