- Docente: Eleonora Rivalta
- Credits: 6
- SSD: GEO/10
- Language: Italian
- Moduli: Eleonora Rivalta (Modulo 1) Massimo Nespoli (Modulo 2)
- Teaching Mode: Traditional lectures (Modulo 1) Traditional lectures (Modulo 2)
- Campus: Bologna
- Corso: Second cycle degree programme (LM) in Physics of the Earth System (cod. 8626)
Learning outcomes
The students will learn what deformations and surface displacements are induced by a variety of subsurface seismic and volcanic sources. The students will learn how to model and interpret signals of past or presently active processes.
Course contents
During the course we will see how sources of deformation partly seen in past courses can be considered in a more applied perspective to model signals measured at the earth'surface. We will seek free surface solutions to analyze and discuss, anhand of MATLAB codes, the displacement fields and compare it with observations from seismic and volcanic areas. We will also learn about techniques used to add complexity to the sources. We will consider:
- Dislocation models of strike-slip faults (infinite space, half-space, coseismic and post-seismic slip, interseismic deformation), distributed slip, applications to faults in nature.
- Dislocation models of normal and thrust faults (Volterra equation, seismic moment tensor, dipping faults, Green's functions, point dislocations, rectangular dislocations).
- Crack models.
- Heterogeneous media.
- Post-seismic relaxation.
- Volcanic deformation: spherical volumetric sources, ellipsoidal sources, volcanic conduits, the Compound Dislocation Model (CDM). Dikes, sills, dislocation and crack models, graben faulting.
- Gravitational effects
- Poroelastic effects
Readings/Bibliography
Paul Segall, Earthquake and volcano deformation
Teaching methods
Frontal lectures in the classroom, discussion, exercises with MATLAB and Julia
Assessment methods
The exam will be oral and will last about 30-45 minutes. In general, the students will be asked to talk about three topics among those treated during the classes, first in terms of general considerations and then in more detail.
The student is expected to be able to derive the main equations describing the theory relevant to each topic; be able to describe main fields of application of the solutions in contemporary research; be able to apply the solutions to solve simple problems; know the orders of magnitude of the main physical quantities used.
Teaching tools
Computer and projector.
Office hours
See the website of Eleonora Rivalta
See the website of Massimo Nespoli