March 16 - May 30, 2011. Intergovernmental Oceanographic Commission (IOC).

UNESCO sent the following documents to the Tsunami Bulletin Board. They include tide gauge data and also have information on known casualties and the number of missing people (different estimates by different entities).

Read the Bulletins:

Visit the Source: 11 March 2011, Mw 9.0, Near the East Coast of Honshu Japan Tsunami - International Tsunami Information Center

Read the IOC Website: Tsunami and Earthquake of 11 March 2011 off the Pacific Coast of Tohoku, Japan

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