Links for EQ lesson

Wave types:
http://www.geo.mtu.edu/UPSeis/waves.html
http://www.geo.mtu.edu/UPSeis/images/P-wave_animation.gif
http://www.geo.mtu.edu/UPSeis/images/S-wave_animation.gif
http://www.geo.mtu.edu/UPSeis/images/Love_animation.gif
http://www.geo.mtu.edu/UPSeis/images/Rayleigh_animation.gif
http://www.allshookup.org/quakes/wavetype.htm
http://aspire.cosmic-ray.org/labs/seismic/index.htm

http://en.wikipedia.org/wiki/File:Ondes_P_et_S_1d_30_petit.gif

http://www.slate.com/articles/news_and_politics/explainer/2001/03/is_the_richter_scale_obsolete.html