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### Seismology II

 Code: 199951 ECTS: 5.0 Lecturers in charge: prof. dr. sc. Marijan Herak Lecturers: dr. sc. Tena Belinić Topić - Exercises doc. dr. sc. Iva Dasović - Exercises Take exam: Studomat

### 1. komponenta

Lecture typeTotal
Lectures 30
Exercises 30
* Load is given in academic hour (1 academic hour = 45 minutes)
Description:
COURSE OBJECTIVES:
Introduction to the physics of generation and propagation of body and surface elastic waves, and study of their basic properties in simple Earth models.

COURSE CONTENT
1. Basic theory of elasticity (repetitorium),
2-3. Navier and wave equations and their
solutions: Helmholtz theorem, elastic potentials,
4. Fourier principle of superposition. Snell's law, ray parameter. P, SV, SH waves.
5-6. Reflection on the free surface: conversion of phases, coefficients of reflection and conversion.
7. Inhomogeneous waves.
8-9. Rayleigh waves in half space, eigenfunctions.
10-12. Love waves in a layer over half-space, period equation, dispersion, modes.
12-13. Phase and group velocity.

LEARNING OUTCOMES
After completing the course students can:
- Define elastic wave types and their properties.
- Apply the Helmholtz theorem in solving the Navier equation.
- Distinguish between three types of motion (P, SV, SH), and define them.
- Distinguish between homogeneous and inhomogeneous waves, and define them.
- Define boundary conditions end derive reflection and conversion coefficients for P SV waves at the free surface.
- Define boundary conditions end derive reflection and refraction coefficients for SH waves at the boundary between two media.
- Define boundary conditions and derive period equations for surface waves in the simplest Earth models; discuss the period equation for Love waves and argue for the existence of modes and dispersion.
- Analyse and compute eigenfunctions for Rayleigh waves in the homogeneous half-space.
- Describe the oscillation of particles on the free surface during the passage of Rayleigh waves.
- Define the phase and group velocity, and compute one from the other.

LEARNING MODE:
- Studying textbook and other literature (including lecture notes), attending lectures, ending lectures,
- Derivation of the equations and study of examples.

TEACHING METHODS:
- lectures, discussion
- derivations of the equations
- solving problems

METHODS OF MONITORING AND VERIFICATION:
Attending lectures, solved homework; Attending the Geophysical seminar (at least 75%). Written colloquium and oral exam.

TERMS FOR RECEIVING THE SIGNATURE:
Solved homework, and written report.

EXAMINATION METHODS:
Oral exam.
Literature:
Prerequisit for:
Enrollment :
Attended : Introduction to Spectral Analysis

Examination :
Passed : Seismology I
 6. semester Mandatory course - Regular study - Bachelor of Geophysics
Consultations schedule: