69716 - Laboratory of Geophysics 2

Learning outcomes

At the end of the course, students will possess technical and practical know-how on some of the main experimental methods of investigation used in Geophysics. Particularly, students will be able to perform shallow surface geophysical prospecting with seismic refraction techniques as well as seismic reflection techniques.

 

Course contents

The course is composed of three modules.

Module 1: Reflection and transmission coefficients for seismic waves across an interface. Refraction seismics. Dromochrones for refracted waves in models with plane parallel interfaces. Dromochrone of a refracted wave on a dipping plane. Direct and conjugate path. Planning a seismic refraction survey. GRM method.

Module 2: Reflection seismics. Dromochrone for a wave reflected by a single plane interface. Reflection hyperbola. Normal-Move-Out (NMO) correction. Reflected waves in a multilayer medium with parallel interfaces. Reflection frpom a single dipping interface - dip move-out. Acquisition configurations. Velocity analysis. Basics on filters. Seismic section. Lab exercises related to reflection seismics on data provided by the teacher and collected in the field.

Module 3: Lab exercises related to refraction seismics on data provided by the teacher and collected in the field.

 

Readings/Bibliography

Slides and lecture notes, mot of which available online at https://iol.unibo.it/ after each lesson.

H. Robert Burger, Exploration Geophysics of the Shallow Subsurface, Prentice Hall.

John M. Reynolds, An introduction to Applied and Environmental Geophysics, John Wiley & Sons.

Alan E. Mussett and M.Aftab Kahn, Esplorazione del sottosuolo, Zanichelli.

 

Teaching methods

Classroom lectures and experiments carried out in the laboratory and in the field.

 

Assessment methods

At the end of the laboratory activities, students must complete two separate reports for the refraction seismics and for the reflection seismics, respectively.

The final test has the aim of ascertaining that the formation objectives are achieved and consists of an oral examination concerning theory as well as the experimental tests carried out in the laboratory and in the field. The typical exam duration is between one hour and one hour and a half.

 

Teaching tools

Slide projector, laboratory.

 

Office hours

See the website of Alberto Armigliato

See the website of Stefano Tinti

See the website of Filippo Zaniboni