EAS 557
INTRODUCTION TO SEISMOLOGY

Instructor: Robert Nowack

OUTLINE

1) Introduction

a) Historic review

b) Theory of Seismometers

3) Elastic Waves in Unbounded Media

a) Stress and strain

b) Equations of motion

c) Propagation of plane waves in isotropic media

d) Acoustic and elastic point sources

4) Seismic Body Waves in Layered Media

a) Reflection and transmission from a single interface

b) Phase shifts and Hilbert transforms

c) Point source solutions/head waves

5) Seismic Ray Theory

a) Fermat's principle/ray equations

b) Ray method in a layered media

c) Travel time inversion in a layered medium

d) Rays in a spherical earth

6) Guided Seismic Waves

a) Wave guides and surface waves (Love and Rayleigh)

b) Dispersion of Love and Rayleigh waves

c) Phase and group velocities

7) Source Mechanisms

a) Moment tensor solutions and source mechanism

b) Source spectra

c) Seismicity

8) Earth Structure - Crust, Mantle and Core

a) Velocity and density structure of the Earth

b) Lateral heterogeneities