Earthquake and Tsunami, Japan, March 11th 2011

Fascinating  Before and After photography

US Geological Survey - Technical details

Stunning photographs from The Boston Globe

The Guardian Newspaper - Interactive Map

Very nice graphical explanation from The New York Times

One cubic metre of water weighs more than a tonne

Other Earthquakes in comparison

Finding people after the disaster

Japan leads the way in earthquake building design

(Washington Post - requires free registration)

Earthquake relief efforts

BBC Coverage -Video