Università degli Studi di Urbino Carlo Bo / Portale Web di Ateneo


GEOPHYSICS
GEOFISICA

Geophysics
Geofisica

A.Y. Credits
2015/2016 6
Lecturer Email Office hours for students
Stefano Santini

Assigned to the Degree Course

Date Time Classroom / Location

Learning Objectives

The module aims to provide to the students the fundamental theoretical concepts of Solid Earth Geophysics

Program

1. Gravimetry - Earth's gravitational field. The gravitational potential. The rotating solid body. The ellipsoid of rotation. The geoid. Deviation from vertical. Absolute measures of gravity. Relative measures. Theory of gravity. Linear gravimeter and astatic gravimeter. Worden gravimeter and Western gravimeter; sensitivity and measuring range. Instrument calibration: determination of the scale factor. Measures of gravity reduction: reduction in free air; Bouguer correction; topographic correction.

2. Geomagnetism - Geo Magnetic Field (GMF). Calculation of magnetic susceptibility. The magnetic dipole moment induced by an external magnetic field. Permanent and induced magnetization. Dia-, para- and ferromagnetism. Antiferromagnetic and ferrimagnetic substances. Hysteresis cycle. Magnetic variometers. Schmidt balance. Twist magnetometer. Absolute magnetic measures. Related measures. Sensitivity and measuring range. Influence on the measures of the variations in time of GMF: secular variation; GMF variation over long periods of time.

3. Structure of the Earth's crust and lithosphere - Definition of the lithosphere. The oceanic lithosphere. The oceanic crust: structure inferred from seismic data. Structure of the subcrustal lithosphere. Thermal state of the lithosphere. Notes on the convection in the mantle.

4. Elasticity and viscoelasticity - Elasticity and viscoelasticity notes of materials: stress and strain, wave equations, P waves and S waves, surface waves. Reflections and refractions. Reflection coefficient. Angle of refraction. The Snell's law.

5. Seismic waves - Three-dimensional wave equation. Plane waves. P waves and S waves. Surface waves.

6. Seismic methods of reflection and refraction - The case of two horizontal layers with constant vertical velocity.

Bridging Courses

"Physics" is strongly suggested.

Teaching Material

The teaching material prepared by the lecturer in addition to recommended textbooks (such as for instance slides, lecture notes, exercises, bibliography) and communications from the lecturer specific to the course can be found inside the Moodle platform › blended.uniurb.it

Didactics, Attendance, Course Books and Assessment

Didactics

Frontal lessons.

Course books

I. A.Norinelli, Geofisica Applicata, Casa Editrice Patron, Bologna.

II. E.Boschi, M.Dragoni, Sismologia, Casa Editrice UTET, Torino.

Assessment

Oral examination.

Additional Information for Non-Attending Students

Didactics

Frontal lessons.

Course books

I. A.Norinelli, Geofisica Applicata, Casa Editrice Patron, Bologna.

II. E.Boschi, M.Dragoni, Sismologia, Casa Editrice UTET, Torino.

Assessment

Oral examination.

« back Last update: 28/09/2015

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