Principles of seismology

1. Seismology, science of earthquakes 2. Fundamental equations of an elastic medium 3. Elastic waves 4. Normal mode theory 5. Reflection and refraction 6. Ray theory, media of constant velocity 7. Ray theory, media of variable velocity 8. Ray propagation in a spherical medium 9. Travel times and structure of the earth 10. Surface waves 11. Wave propagation in layered media 12. Wave dispersion, phase and group velocity 13. Free oscillations of the earth 14. Anelasticity and anisotropy 15. Earthquake parameters 16. Source mechanism 17. Seismic moment tensor 18. Models of fracture 19. Methods of source mechanism determination 20. Seismicity, seismotectonics and seismic risk 21. Seismographs and seismograms Appendix 1. Vectors and tensors Appendix 2. Cylindrical and spherical coordinates Appendix 3. Bessel and Legendre functions Appendix 4. Fourier transform Appendix 5. Parameters of the earth Appendix 6. Interior of the earth Appendix 7. Important earthquakes Appendix 8. Problems and exercises.