How the Indian Ocean tsunami warning system works s1180028 Naohiro Nakamura
Overview● Introduction● India before 2004● Here is how the system works - 1● Here is how the system works - 2● How to make announcement to populations● Conclusion
Introduction A tsunami in the Indian Ocean killed almost230,000 people in 2004. ↓ The United Nations IntergovernmentalOceanographic Commission began coordinatingefforts to create an Indian Ocean tsunami earlywarning system.
India before 2004● There were no sea-level monitoring instruments● Many countries did not have agencies responsible for tsunami warnings● Many countries did not have points of contact to receive messages from international warning centers● In recent years, Indian prepare the tsunami warning system
Here is how the system works - 1 ● An earthquake strikes in the Indian Ocea ● Data from a variety of sources are transmitted to the PTWC based in Hawaii and the JMA in Tokyo. ● These two centers determine whether they have the potential to produce tsunamis and predict tsunami wave arrival times wherever possiblePTWC : Pacific Tsunami Warning CenterJMA : Japan Meteorological Agency
Here is how the system works - 2● Many national agencies have received their own information, from local or regional seismic centers, buoys, news bulletins and so on.● Information will be fed back and forth between Hawaii, Japan and the region.● Warnings to the population by many different routes
How to make announcement to populations● radio ● bells● television ● megaphone● SMS ● loud-speakers● emailIn some countries, well-rehearsed drills will kickin and local agencies will coordinate anevacuation.
Conclusion Through the experience in 2004, tsunamiwarning system is created. Tsunami warning is determined fromobserved data, and warnings to thepopulation by many different routes. By grace of this system, death toll fromtsunami disaster will decrease.