This video is really impressive. It is a representation of all the earthquakes that shaked Japan during 2011. At 1:45 the really big shake starts, first with a M7.3 earthquake on March 9th (it was some kind of warning about what was coming next) and then a M9.0 two days later, which unleashed hundreds of replicas that had us feeling seasick (earthsick?) and frightened for months.
Watch it with the sound on!