There have been hundreds of earthquakes in Japan in the week since the magnitude 9 quake struck at 2:46pm on March 11th. Trying to visualize their impact with simple epicenter/magnitude plots doesn't really tell you about the one thing that really matters: how much did the ground shake where you're standing?
Rather than looking simply at the epicenter and magnitude, this graphic was created using data from thousands of accelerometers around the country, to accurately represent the level of movement someone standing on the ground in each location would actually feel. This is much more descriptive than the wild guess we might make based upon magnitude, distance, depth, plate structure, ground composition, etc. No guesses need to be made because actual ground movement is measured at thousands of points across the country.
One second of video represents 1 hour of real time: each day takes 24 seconds of video. I created it at 1080x720, so it's best to view full screen at 720p.
It would be better to have music of some sort, but I can't think of anything that would be appropriate that I have rights to.