In response to the Tohoku Earthquake and Tsunami Mar 11th 2011, the Harvard Center for Geographic Analysis has launched this web portal.
If you have data to share, or need an upload point for inter-agency data exchange, please contact us:
The main point of contact of the Japanese Government for Earthquakes, is here.
The USGS Earthquake Hazards Program Summary of the Honshu event is here.
An excellent background series on the regional geography and impact of the event has been assembled by the Tohoku Geographical Association here.
All copyrights are retained by the original producers of the data, and downloads from this portal are for academic, non-commercial, relief and reconstruction efforts only.