What is Tsunami warning system?
[[File:20110311Houshu.ogv|thumb|Animation of the [[2011 Sendai earthquake and tsunami|2011 Sendai tsunami]].]] '''Tsunami warning system''' or '''TWS''' detects [[tsunami]]s and issues warnings to prevent loss of life and property. It consists of two equally important components: a ''network of sensors'' to detect tsunamis and a ''communications infrastructure'' to issue timely alarms to start evacuation before the big waves reach the [[land]] to let the people to rush to safety.<ref>{{Cite web |url=http://ptwc.weather.gov/ |title=Pacific Tsunamy Warning Center |access-date=2021-01-01 |archive-date=2011-03-13 |archive-url=https://www.webcitation.org/5x8nAhhwJ?url=http://ptwc.weather.gov/ |url-status=dead }}</ref> There are two distinct types of tsunami warning systems: ''international'' and ''regional''.<ref>{{Cite web |url=http://www.tsunami.noaa.gov/warnings_forecasts.html |title=NOAA Tsunami Warnings and Forecasts |access-date=2011-03-21 |archive-date=2011-04-18 |archive-url=https://web.archive.org/web/20110418221600/http://www.tsunami.noaa.gov/warnings_forecasts.html |url-status=dead }}</ref> Both of those systems depend on the fact that ''tsunami waves'' travel, approximately, 15-30 times slower than ''seismic waves''.<ref>[http://www.google.com/search?q=seismic+waves&hl=en&client=flock&hs=maW&channel=fds&prmd=ivns&tbm=isch&tbo=u&source=univ&sa=X&ei=qDGJTefJNY-4sQPf_JyADA&ved=0CEoQsAQ&biw=976&bih=527 Images for seismic waves]</ref> ==Notes== {{reflist}} {{Tsunami}} [[Category:Tsunamis]]