http://www.prh.noaa.gov/ptwc/?region=0   (NOAA's Pacific Tsunami Warning Center…information about watches and warnings)
http://walrus.wr.usgs.gov/tsunami   (USGS Tsunami page)
http://www.tsunamiready.noaa.gov    (NOAA's Tsunami-Ready page)
http://nctr.pmel.noaa.gov/Dart   (NOAA's Deep-ocean Assessment and Reporting of Tsunamis network)