Google Crisis Response Map
The Google Crisis Response team has produced a Google Map to show the locations of shelters in Japan and the evacuation area around the Fukushima nuclear plant.
The map also includes layers to show the epicentre of the earthquake and the location of the tectonic plates.
CNN - Earthquake Impact Map
CNN has put together a number of video reports, photos and stories about the Japanese earthquake on this Google Map.
National Data Buoy Center Map
The NDBC uses Google Maps to show buoys in 'event' mode. Using the map you can view the measurements of water height for the last 5 days.
Using the map you can view the effect of yesterday's tsunami across the Pacific Ocean.
Earthquake Tweet Map
Mibazaar has rolled out his Tweet response map for the Japan Earthquake. The map allows you to view the latest real-time news from Japan as posted to Twitter. The map shows the latest Tweets concerned with the earthquake.
Seismic Activity in the Last 7 Days
This Google Maps from MapLarge shows seismic activity over the last 7 days. The map markers are color-coded and sized to reflect the strength of activity at different locations.
Japan Earthquake Maps