Phone: +31 (0)30 253 5086
Fax: +31 (0)30 253 2648

Jeannot Trampert

My main interest is the study of the Earth's deep interior. Most information is obtained from seismic tomography, but not much is known about the reliability of the models. To address this problem, my collaborators and I employed a full model space search technique to solve the long wavelength tomographic problem. Besides robust error and correlation estimates,  we discovered solutions which previously escaped attention. We are particularly interested in anisotropy and density and their interpretation in terms of temperature and compositional changes. I have strong interests in all aspects of inverse theory and recently started to work on shallow problems relevant to the exploration industry.

e-mail: trampert@geo.uu.nl
phone: +31 (0)30 253 5088

Hanneke Paulsen

My primary research interest is observational seismology, and much of my research is based on waveform information using regional seismic networks such as the NARS network of Utrecht University. Most of my research in the past were body wave studies of the mantle and core, as well as crustal anisotropy, but in recent years I changed focus a bit to surface wave studies of the mantle. Recent work is devoted to the Gulf of California using data of the NARS network.

e-mail: paulssen@geo.uu.nl
phone: +31 (0)30 253 5089

Rob van der Hilst

e-mail: hilst@mit.edu
website: http://quake.mit.edu/hilstgroup/robspage

Arie van Wettum

My main responsibility is the deployment of our seismological equipment in the different (NARS) projects. It involves the design and upgrade of the necessary hard and software as well as the field installation, maintenance and data processing. Programming skills are C, Assembly, Fortran, HTML and Basic, used at different platforms. Main interests are system developments to reduce space, energy and cost while reliability and quality increase.

e-mail: wettum@geo.uu.nl
phone: +31 (0)30 253 5159

Jacqueline Landsheer

e-mail: landsh@geo.uu.nl
phone: +31 (0)30 253 5086

Wouter Kimman

My goal is to use ambient noise for seismic exploration purposes. The Green's function between two stations can be extracted by cross-correlating the waves recorded at these two receivers. We apply surface wave tomography on Green's functions retrieved from a network of stations. This enables us to invert for a high resolution 3D structure of bulk sound and shear wave velocity.

e-mail: kimman@geo.uu.nl
phone: +31 (0)30 253 5087

Ilaria Mosca

Over the past decades, seismic tomography, an inversion technique for interpreting seismic observations in terms of three dimensional variations of elastic properties, has produced spectacular images of the Earth's interior structure. While much effort has been put into increasing the vertical and lateral resolution of the images, relatively little progress has been made towards the quantitative assessment of the accuracy and uniqueness of the models. A recent attempt in that direction has been made here in Utrecht using a technique referred to as probabilistic tomography. So far we only managed to map the Earth's longest wavelength structure using surface waves and free oscillation data. My project aims to include the great wealth of body wave information and dramatically increase the resolution of the models obtained by this technique.

e-mail: mosca@geo.uu.nl
phone: +31 (0)30 253 5087

Tedi Yudistira

The goal of my current research is to produce an integrated seismic-speed image of the deep structure of The Netherlands using data from a new temporary seismic network. I will use surface wave tomography (by using earthquake and also noise as data) and receiver functions, where the results from one method will constrain the other, so I will use a joint inversion of surface waves and receiver functions. The new seismic-speed model together with existing shallow models will improve our understanding to the geological processes of The Netherlands.

e-mail:tedi@geo.uu.nl
phone: +31 (0)30 253 5087

Florian Rickers

The role of mantle plumes in mantle convection and tectonics is still heavily debated, the main reason being difficulties in finding direct evidence for plumes. Most evidence so far is indirect, and the direct approaches taken to date are discussed controversially. The aim of my PhD project is to develop a direct method to identify mantle plumes. For that purpose I am using recently developed tools in computational seismology in order to identify the parts of the seismogram which are most sensitive to low velocity channels. These results will be used with tomographic methods and hopefully enable us to map mantle plumes directly.

e-mail: rickers@geo.uu.nl
phone: +31 (0)30 253 5087

Laura Cobden

I have used seismology to investigate a range of phenomina, from the surface of the sun to the lowermost mantle. My current work is centred around tomographic imaging underneath Europe. I am particularly interested in the physical interpretation of seismic data, in terms of mineralogy and thermochemistry.

e-mail: laura@geo.uu.nl
phone: +31 (0)30 253 5135

Benoît Tauzin

My purpose is to image the deep Earth interior, from the lithosphere to the lower mantle, and relate observed seismic heterogeneity to what we know of mineral physics, geodynamics and geochemistry. I currently focus on mantle seismic discontinuities, particularly the ones located at 410 and 660 km depth in the mantle transition zone. My seismological tools range from reflected/converted body-waves (receiver functions, SS-precursors) to surface-waves.

e-mail: benoit@geo.uu.nl
phone: +31 (0)30 253 5135

Andreas Fichtner

My research is centered around the development and the application of numerical wave propagation methods to seismic tomography. Specifically I am working on a full waveform inversion of the European upper mantle, probabilitic waveform tomography and the sampling problem in high-dimensional model spaces.

e-mail: fichtner@geo.uu.nl
phone: +31 (0)30 253 5948

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