PTWC 2
PTWC 2 : Pacific Tsunami Warning Center. PTWC is the headquarters of the operational Tsunami Warning System (TWS) in the Pacific and works closely with other regional national centers in monitoring seismological and tidal stations and instruments around the Pacific Ocean, to evaluate potentially tsunamigenic earthquakes. PTWC is operated by the United States National Weather Service. (http://www.nws.noaa.gov/pr/ptwc)