The New York Times has many features about the earthquake and tsunami in Japan. Here are three that stand out.
The Crippled Japanese Nuclear Reactors is a set of drawings and animations that depicts how nuclear power plants are constructed and what could cause a meltdown at those facilities.
Map of the Damage From the Japanese Earthquake is an interactive map of sixteen locations in Japan affected by the earthquake. Zoom and click on the icons to see images and read information about each location.
How Shifting Plates Caused the Earthquake and Tsunami in Japan is a series of drawings and animations that explain what causes earthquakes and tsunamis.