How the Indian OceanTsunami Warning System Works?s1180054, Yoshinobu Kimezawa
IntroductionThe Pacific Tsunami Warning Centre (PTWC)has been alerting countries in the Pacific region tothe dangers of killer waves for a long time. As a result of the 2004 Indian Ocean tsunami thatkilled almost 230,000 people, the United NationsIntergovernmental Oceanographic Commissionbegan coordinating efforts to create an IndianOcean tsunami early warning system.
When an Earthquake HappensWhen an earthquake happens in the Indian Oceanregion, data from a variety of sources istransmitted to the Pacific Tsunami WarningCentre (PTWC) based in Hawaii and the JapanMeteorological Agency (JMA) in Tokyo.
The PTWC and JMAThe two centres have the primary responsibility.They receive earthquake information and datafrom tidal gauges and Deep-ocean Assessmentand Reporting of Tsunamis (DART) sensors orbuoys. They also receive breaking news,telegrams, and information over the telephone.
The Job of PTWC and JMAThe job of these two centres is going to locate anddetermine the size of earthquakes, determinewhether they have the potential to cause tsunamisand predict tsunami wave arrival times whereverpossible.
Difficult to issue fastIt takes about 15 to 20 minutes for earthquakedata to be deciphered and a tsunami watch to beissued, according to the PTWC. Inlandearthquakes will not result in tsunamis and not allunderwater earthquakes result in tsunamis. Thisdepends on the location and nature of theearthquake.
The Way to AlertWarnings to the people are delivered in a varietyof ways. Over the airwaves - radio, television,SMS, email - and manually, using bells,megaphones or loud-speakers attached tomosques.
ConclusionThe tsunami warning system is a great tool.However, it does not reach all areas and even if itdoes, warnings can be confused. In other areas,there are no escape routes as transportinfrastructure is poor.