A5088995096- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Landslides and related hazards
- Seismic Waves and Analysis
- Remote-Sensing Image Classification
- Geophysical and Geoelectrical Methods
- High-pressure geophysics and materials
- Geophysics and Gravity Measurements
- Geological and Geochemical Analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies
- Geomagnetism and Paleomagnetism Studies
- Soil Geostatistics and Mapping
- Seismology and Earthquake Studies
- Geophysical Methods and Applications
- Mineral Processing and Grinding
- Remote Sensing and LiDAR Applications
- Hydrocarbon exploration and reservoir analysis
- Remote Sensing and Land Use
- Remote Sensing in Agriculture
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Geological and Geophysical Studies Worldwide
- Geological Modeling and Analysis
- Earthquake Detection and Analysis
- Cryospheric studies and observations
University of Twente
2015-2024
Engineering Science Analysis (United States)
2011-2020
ISRIC - World Soil Information
2010
Instituto de Geofísica y Astronomía
2004
ETH Zurich
2003-2004
École Polytechnique Fédérale de Lausanne
2004
Sociedade Brasileira de Geofísica
2004
Board of the Swiss Federal Institutes of Technology
2003
Abstract. Until now, a full numerical description of the spatio-temporal dynamics landslide could be achieved only via physically based models. The part geoscientific community in developing data-driven models has instead focused on predicting where landslides may occur susceptibility Moreover, they have estimate when that belong to early-warning system or rainfall-threshold classes. In this context, few published research works explored joint model structure. Furthermore, third element...
Water in the deep upper mantle can influence properties of seismic discontinuities transition zone. Observations converted waves provide evidence a 20- to 35-kilometer-thick discontinuity near depth 410 kilometers, most likely explained by as much 700 parts per million water weight.
We develop a new continental scale crustal model for Africa by modelling the free-air gravity anomaly EIGEN-GL04C, which was developed from 30 months of GRACE Level 1B data covering period 2003 February to 2005 July, and surface seven different sources. From this model, thickness is estimated using 3-D Euler deconvolution, method that does not rely on priori depth density constraints. The results are in good agreement (i.e. within 5 km) seismically determined Moho estimates across continent,...
There is a gap between lab experiments where resistivity-soil moisture relations are generally very good and field studies in complex environmental settings always less complicated by many factors. An experiment was designed more controlled, the best outside laboratory, to assess transferability from outdoor. A carried out evaluate use of electric resistivity tomography (ERT) for monitoring soil dynamics over period 67 days. homogeneous site central part The Netherlands selected consisting...
Landslides are one of the most recurring and damaging natural hazards worldwide, with rising impacts on communities, infrastructure, environment. Landslide hazard, vulnerability, risk assessments critical for landslide mitigation, land use developmental planning. They are, however, often lacking in complex data-poor regions. This study proposes an integrated approach to evaluate using a range freely available geospatial data semi-quantitative techniques landslide-prone areas Hindukush...
Ground motion simulations solve wave equations in space and time, thus producing detailed estimates of the shaking time series. This is essentially uncharted territory for geomorphologists, we have yet to understand which ground (synthetic or not) parameter, combination parameters, more suitable explain coseismic landslide distribution. To address this gap, developed a method select best simulation using Synthetic Aperture Radar Interferometry (InSAR) strong data. Upon selecting simulation,...
We have analysed receiver functions to derive simple models for crustal structure below 12 broad-band seismological stations from the MIDSEA project and 5 permanent in Mediterranean region including northern Africa. To determine an accurate Moho depth we reduced trade-off between velocities discontinuity using a new grid search method, which is extension of recently published methods thickness. In this method best fitting synthetic function, containing both direct conversion reverberated...
Spectral matching algorithms, such as the Angle Mapper (SAM), utilize spectral similarity between individual image pixel spectra and a reference library with known components. Here, we illustrate quantify effects that different sources of libraries have on SAM classification results. Synthetic images three mineral endmembers were classified by using derived from airborne hyperspectral imagery, ground (Portable Infrared Mineral Analyser), standard (United States Geologic Survey). Results show...
We use data from recently installed broad-band seismographs on the islands of Crete, Gavdos, Santorini, Naxos and Samos in Hellenic subduction zone to construct receiver function images crust upper mantle south Crete into Aegean Sea. The stations are equipped with STS-2 seismometers they operated by GFZ Potsdam, University Chania ETH Zürich. Teleseismic earthquakes recorded these at epicentral distances between 35° 95° have been used calculate functions. method is a routinely tool detect...
A new map for the Moho discontinuity (EAM02) in Eurasia–Africa plate boundary region is presented. Reliable results have also been obtained southern and eastern Mediterranean Basin, northern African coasts Atlantic Ocean, regions only occasionally considered studies on region. The topography model derived from two independent sets of constraints. Information contained fundamental higher-mode Rayleigh waves waveform modelling used to constrain depth between estimates crustal thickness taken...
In this article we describe a new instrumental setup at the University of Twente Faculty ITC with an optimized processing chain to measure absolute directional-hemispherical reflectance values typical earth science samples in 2.5 16 µm range. A Bruker Vertex 70 FTIR spectrometer was chosen as base instrument. It modified external integrating sphere 30 mm sampling port allow measuring large, inhomogeneous and quantitatively compare laboratory results airborne spaceborne remote sensing data....