Seismology Animations
(Source to credit)

Subduction-earthquake animation
(USGS)

Strike-slip earthquake animations illustrating some common effects of shaking hazards.
(USGS)

S-wave animation
(USGS)

P-wave animation
(USGS)

Images from Alan Jones' free program, Seismic Waves, which shows wave fronts traveling through and around the Earth.
(Alan Jones)

2004 Indonesian tsunami animations
(NOAA)

Volcanic eruption animation (click on image for full animation).  Supporting report and paper model:  http://jclahr.com/alaska/aeic/taurho/volcano/volcano.html
(USGS)