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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 almost
230,000 people in 2004.
  ↓
 The United Nations Intergovernmental
Oceanographic Commission began coordinating
efforts to create an Indian Ocean tsunami early
warning 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 possible
PTWC : Pacific Tsunami Warning Center
JMA : 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
● email

In some countries, well-rehearsed drills will kick
in and local agencies will coordinate an
evacuation.
Conclusion

 Through the experience in 2004, tsunami
warning system is created.
 Tsunami warning is determined from
observed data, and warnings to the
population by many different routes.
 By grace of this system, death toll from
tsunami disaster will decrease.

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SW3 7 19_no_3

  • 1. How the Indian Ocean tsunami warning system works s1180028 Naohiro Nakamura
  • 2. 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
  • 3. Introduction A tsunami in the Indian Ocean killed almost 230,000 people in 2004.  ↓ The United Nations Intergovernmental Oceanographic Commission began coordinating efforts to create an Indian Ocean tsunami early warning system.
  • 4. 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
  • 5. 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 possible PTWC : Pacific Tsunami Warning Center JMA : Japan Meteorological Agency
  • 6. 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
  • 7. How to make announcement to populations ● radio ● bells ● television ● megaphone ● SMS ● loud-speakers ● email In some countries, well-rehearsed drills will kick in and local agencies will coordinate an evacuation.
  • 8. Conclusion Through the experience in 2004, tsunami warning system is created. Tsunami warning is determined from observed data, and warnings to the population by many different routes. By grace of this system, death toll from tsunami disaster will decrease.