CESS Seminar : Magma propagation by diking: geophysical observations and mechanical models of the pathways followed by fluid-filled cracks
Event details
| Date | 07.07.2023 |
| Hour | 11:00 › 12:00 |
| Speaker | Prof Eleonora Rivalta (University of Bologna) |
| Location | Online |
| Category | Conferences - Seminars |
| Event Language | English |
Abstract
Magma propagates in brittle elastic rocks by diking, which is a form of hydraulic fracturing. Dikes are voluminous (>10^5 m^3) magma-filled cracks oriented roughly perpendicular to the least compressive elastic stress axis, driven by their buoyancy pressure or by external stress gradients such as those induced by the flanks of a volcano. Prof Eleonora Rivalta will illustrate high-quality geophysical observations of recent dikes, focusing on deformation and seismicity. Next, she will illustrate the models her students and herself have developed over the years, first in 2D and, more recently, in 3D, as well as their strategy to forecast future magma pathways and the opening location of future eruptive fissures.
Short Bio
Eleonora Rivalta is a senior scientist at the German Research Centre for Geosciences in Potsdam and an Associate Professor at the University of Bologna in Italy. She graduated from the University of Bologna (both a Master's and PhD in Physics). She did post-docs at the University of Hamburg and in Bologna and spent a long research stay in Stanford with Paul Segall. Next, she worked as a lecturer at the University of Leeds, UK. Finally, she moved back to Germany where she started her ERC Starting Grant group on the physics of magma propagation. Her main interests are the mechanics of magma propagation by diking, especially modelling the influence of crustal heterogeneities and the external stress field on the expected magma trajectories, and simulating the expected geophysical observations.
Sandwiches will be provided at the end of the seminar
Magma propagates in brittle elastic rocks by diking, which is a form of hydraulic fracturing. Dikes are voluminous (>10^5 m^3) magma-filled cracks oriented roughly perpendicular to the least compressive elastic stress axis, driven by their buoyancy pressure or by external stress gradients such as those induced by the flanks of a volcano. Prof Eleonora Rivalta will illustrate high-quality geophysical observations of recent dikes, focusing on deformation and seismicity. Next, she will illustrate the models her students and herself have developed over the years, first in 2D and, more recently, in 3D, as well as their strategy to forecast future magma pathways and the opening location of future eruptive fissures.
Short Bio
Eleonora Rivalta is a senior scientist at the German Research Centre for Geosciences in Potsdam and an Associate Professor at the University of Bologna in Italy. She graduated from the University of Bologna (both a Master's and PhD in Physics). She did post-docs at the University of Hamburg and in Bologna and spent a long research stay in Stanford with Paul Segall. Next, she worked as a lecturer at the University of Leeds, UK. Finally, she moved back to Germany where she started her ERC Starting Grant group on the physics of magma propagation. Her main interests are the mechanics of magma propagation by diking, especially modelling the influence of crustal heterogeneities and the external stress field on the expected magma trajectories, and simulating the expected geophysical observations.
Sandwiches will be provided at the end of the seminar
Practical information
- Informed public
- Free
Organizer
- Prof. Olga Fink (IMOS), Prof. Alexandre Alahi (VITA), Prof. Dusan Licina (HOBEL), Prof. Alain Nussbaumer (RESSLab)
Contact
- Andreas Möri (GEL)