| Faculty | Postdocs | MSc students | |||
| Jeannot Trampert | |
Andreas Fichtner | Pablo Gregorian | ||
| Hanneke Paulssen | Andrew
Valentine |
Bas Peters | |||
| Electronics Engineer | PhD students | Alumni | |||
| Arie van Wettum | Paul Käufl | PhDs and Postdocs | |||
| Florian Rickers | |||||
| Denise de Vos | |||||
| Group Secretary | Ralph de Wit | ||||
| Jacqueline Landsheer | Tedi Yudistira | ||||
Phone:
+31 (0)30 253 5086 |
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Jeannot Trampert Research
Interests website:
http://www.geo.uu.nl/~jeannot |
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Hanneke PaulssenMy
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. |
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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.
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Jacqueline LandsheerSecretary of the seismology group.
e-mail: landsh@geo.uu.nl |
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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. |
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http://www.geo.uu.nl/~fichtner |
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Paul Käufl My research
interest lies in the application of probabilistic techniques such as Monte
Carlo methods and artificial neural networks to tomographic inverse problems.
The goal of my project is the generation of global wave speed and density
models in the upper and lower mantle and the estimation of earthquake
source locations and moment tensors by inverting full seismograms in a
fully non-linear way. The resulting global seismic models may then be
used to find constraints on thermo-chemical variations in the Earth's
mantle e-mail:
kaeufl@geo.uu.nl |
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Florian Rickers The role
of mantle plumes in mantle convection and tectonics is still unclear,
mainly because concluding direct evidence for their existence and about
their possible source region is missing. The validity of seismological
approaches taken to date has been discussed controversially and results
are not generally agreed on. The aim of my PhD project is to improve tomographic
techniques with a focus on the possibility to properly account for effects
caused by the finite frequency nature of seismic waves. These effects,
especially scattering, diffraction and the resulting wave front healing,
enable mantle plumes to hide from the 'tomographic eye' until now. I am
using a highly accurate full 3D wave propagation code and adjoint methods
to first develop the necessary theoretical techniques and later apply
them to seismic data for regions like Iceland and Yellowstone, hopefully
resulting in new information about the nature of mantle plumes. |
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Andrew Valentine My research is centred on global tomography: how can we improve images of the Earth's interior? In order to do so, we must understand how the various choices made in setting up an inversion affect the final model; we must also develop tools to allow us to take full advantage of the wide range of seismic data now available. Can the process of data selection and quality control be automated, enabling inversion of larger datasets? Are we extracting all useful information from each seismogram? Other research interests include the problem of seismic source determination, and the integration of seismic and geodetic datasets. I am supported by the QUEST project, www.quest-itn.org website:
http://www.geo.uu.nl/~andrew |
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Denise de Vos The aim of my research is to improve our knowledge of the tectonic evolution of the Gulf of California. Using surface wave data from the NARS-Baja project, 3-D imaging of this region (Zhang, 2009) has shown large differences in mantle structure between the northern and the southern parts of the gulf. In this study, noise data from both NARS stations and ocean bottom seismographs in the southern part of the gulf (SCOOBA experiment) will be used, in order to more accurately determine the crustal and mantle shear velocity structure with anisotropy. Hopefully, this will give more insight in the formation and evolution of the gulf e-mail: denise@geo.uu.nl |
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Ralph de Wit The aim of my project is to construct global tomographic models of wave speeds and density in the Earth's mantle and convert these seismic models to models of thermo-chemical variations in the Earth's mantle. Accurate knowledge of thermo-chemical variations inside the Earth is crucial in our quest to obtain a solid understanding of mantle dynamics and the thermo-chemical evolution of the Earth. To do so, we want to invert for complete seismograms in a fully non-linear way by using neural networks. Artificial neural networks can be used to represent non-linear mappings and are therefore potentially very suitable for the particular application of seismic waveform tomography. e-mail:
rdewit@geo.uu.nl |
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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.
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