NOAA/NWS West Coast/Alaska Tsunami Warning Center
http://wcatwc.arh.noaa.gov/
Summary
The West Coast/Alaska Tsunami Warning Center objectives are to rapidly locate and size major earthquakes in the Pacific basin, determine their tsunami potential, predict tsunami arrival times and, when possible, runup on the coast, and provide timely and effective tsunami information and warning bulletins for the Pacific coastal populations of California, Oregon, Washington, British Columbia, and Alaska.
Data Distribution
Alaska Earthquake Information Center (AEIC)
National Earthquake Information Center (NEIC)