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Titre : Improvement of the kinematic model of Switzerland (Swiss 4D 2) Type de document : Thèse/HDR Auteurs : Arturo Villiger, Auteur Editeur : Zurich : Schweizerischen Geodatischen Kommission / Commission Géodésique Suisse Année de publication : 2014 Collection : Geodätisch-Geophysikalische Arbeiten in der Schweiz, ISSN 0257-1722 num. 90 Importance : 130 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-908440-36-9 Note générale : Bibliographie
Doctoral ThesisLangues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] collocation par moindres carrés
[Termes IGN] déformation de la croute terrestre
[Termes IGN] positionnement par GNSS
[Termes IGN] réseau géodésique local
[Termes IGN] Suisse
[Termes IGN] tectonique des plaques
[Termes IGN] tensionIndex. décimale : 30.82 Applications géophysiques de géodésie spatiale Résumé : (Auteur) Switzerland is a region with relatively low seismicity compared to other lithospheric subduction zones. However, from historic earthquakes it is known that events with large magnitudes, above 6, have occurred. A major task was to extract the tectonic pattern of the velocity field based on Global navigation Satellite Systems (GNSS) campaign type data (CHTRF 2010 solution) given the fact that the noise level and local influences are within the same order of magnitude as the deformation occurring.
The introduction of the adaptive least-squares collocation (ALSC) and its enhancement to determine the tectonically driven deformation field allowed to extract a reliable kinematic model for Switzerland. The final solution consists of the velocity field and its derivative, the strain rate field. Due to the relatively high density of measurement points, re-measured three or more times, the field could be retrieved from the data set. The horizontal velocities are mostly below 1 mm/yr and the uplift rates, determined from precise levelling, between 0 and 1.5 mm/yr. The deformation rates deduced amount to 25 nstrain/yr.
The thin plate model allowed to estimate also the vertical strain rate which was not possible to retrieve by the collocation technique alone. This is due to the lack of missing measurements within the crust since all levelling and GNSS measurements are performed on the surface. The comparison of the strain rate field with seismological data showed a good accordance. The horizontal strain field confirms a compression of 15 nstrain/yr perpendicular to the Alpine chain. In the canton Valais seismic recordings observed extensional stress regimes. The collocation technique could reproduce the extension and retrieved a strain rate of 20 nstrain/yr. At the boundary of the study area uncertainties exists because of missing data outside Switzerland. This is a particular problem in the city of Basel, which lies at the southern end of the Upper Rheingraben. The 3-D strain rate tensor, using the thin plate model, has shown mostly similar fault plane solutions as the one obtained from earthquake analysis. The same is valid for the strain rate energy compared with the seismic energy released by earthquakes. The highest strain energy density is found in the eastern and western part of the Swiss Alps.
This project has been funded by swisstopo and the Geodesy and Geodynamics Lab, ETH Zurich. The work which was carried out for the project COGEAR was financed by the Competence Center Environment and Sustainability of the ETH Domain (CCES).Note de contenu : 1 Introduction
1.1 Scope of work
1.2 Research tasks
1.3 Tectonic setting
1.4 Geodetic strain determination in Switzerland
2 Data and data analysis
2.1 Data sources
2.2 Regional effects
2.3 Local effects
2.4 Multipath
2.5 Uplift rates from GNSS and levelling
3 Block detection
3.1 Automatic block detection using a genetic algorithm
3.2 Manual block definition based on geological information
3.3 Conclusion
4 Adaptive least-squares collocation: Theory
4.1 Theory
4.2 Dilatation
4.3 Parameter estimation
4.4 Thin plate model
4.5 Strain energy density
4.6 Fault planes from strain
5 Adaptive least-squares collocation: Results
5.1 Generic example
5.2 CHTRF 2010
6 Comparison of the strain rate field with geophysical findings
6.1 Kinematic Model of Switzerland
6.2 Strain Energy
6.3 Strain rate tensor comparison
6.4 Comparison with seismic findings
6.5 Comparison with world wide models
7 Dense GNSS network for small scale tectonic analysis in the Canton of Valais
7.1 Introduction
7.2 GNSS network
8 Conclusion and outlookNuméro de notice : 15849 Affiliation des auteurs : non IGN Autre URL associée : URL ETH Zurich Thématique : POSITIONNEMENT Nature : Thèse étrangère DOI : 10.3929/ethz-a-010163325 En ligne : http://e-collection.library.ethz.ch/view/eth:8673 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75687 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 15849-01 30.82 Livre Centre de documentation Géodésie Disponible
Titre : Influence de la métrique sur les notions de courbure d'un espace géométrique Type de document : Mémoire Auteurs : M. Bourdier, Auteur Editeur : Paris : Institut Géographique National - IGN (1940-2007) Année de publication : 1996 Collection : Publications du LAREG Sous-collection : Mémoire de stage Importance : 16 p. Format : 21 x 30 cm Note générale : Bibliographie
Mémoire de stageLangues : Français (fre) Descripteur : [Vedettes matières IGN] Mathématique
[Termes IGN] conduction
[Termes IGN] espace courbe
[Termes IGN] géodésie mathématique
[Termes IGN] géométrie différentielle
[Termes IGN] métrique
[Termes IGN] tension
[Termes IGN] torsion géodésiqueIndex. décimale : MX Mémoires divers Numéro de notice : 64378 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Rapport de stage Organisme de stage : LAREG (IGN) Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=44400 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 64378-01 MX Livre Centre de documentation En réserve Mezzanine Disponible
Titre : Mesures électriques et électroniques Type de document : Monographie Auteurs : J. Thurin, Auteur Editeur : Paris : Eyrolles Année de publication : 1964 Importance : 445 p. Format : 15 x 24 cm Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Physique
[Termes IGN] courant électrique
[Termes IGN] instrument de mesure
[Termes IGN] tensionNuméro de notice : 50091 Affiliation des auteurs : non IGN Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=59042 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 50091-01 24.13 Livre Centre de documentation En réserve M-103 Disponible
