ITSU Master Plan


The last edition of the ITSU Master Plan was revised in July 2004.

As stated in the Second Edition of the ITSU Master Plan “The International Coordination Group for the Tsunami Warning System in the Pacific (ICG/ITSU), of the Intergovernmental Oceanographic Commission of UNESCO, was established in 1968 and is composed of Member States from all parts of the Pacific region. The purpose of ICG/ITSU is to provide or improve all aspects of tsunami mitigation in the Pacific including hazard assessment, warnings, preparedness, and research through a system of international cooperation and coordination of activities.”
In October 2005 ICG/ITSU was superseded by the Intergovernmental Coordination Group for the Tsunami Warning and Mitigation System in the Pacific (ICCG/PTWS).

This document, the third and finall edition of the ICG/ITSU Master Plan was initiated following the ICG/PTWS Officers Meeting in October 2008. It gives a brief overview of tsunamis and the tsunami hazard in the Pacific at a time shortly preceding the catastrophic Indian Ocean tsunami on December 26, 2004. At that time, the Tsunami Warning System in the Pacific (TWSP) was the world’s only operational tsunami warning system, and the ICG/ITSU, under the auspices of the IOC, was the only international coordination group. This Third Edition of the ITSU Master Plan summarizes the history of the Tsunami Warning System in the Pacific, outlines the key components and activities for building an effective tsunami warning and mitigation system, and presents the views of the ICG/ITSU on its status and progress until 2004 and areas for highest priority action by ITSU for improving the TWSP.



find us on facebook

Featured Resources

banner materiales educativos

Regional Disaster Information Center (Latin America & the Caribbean)

A database of Spanish language materials focused on tsunami preparedness.
dsc00149 thumbnail

Post-Tsunami Survey:
El Salvador Summary Video

Learn the basics of a post-tsunami survey.

TsunamiTeacher USA
Tsunami Basics

Also on YouTube youtube_logo
(w/closed captioning)

Learn the basics of tsunamis. Available in English and Samoan.

Tsunamis on the Move

Tsunami Awareness Poster

Awareness poster available in English, Chinese, French, Japanese, Korean, Portuguese, Singalese.


Global Hazard Maps

Posters of Tsunami Sources, Significant Earthquakes and Significant Volcanic Eruptions. Also Tsunami Sources Icosohedron Globe.

great waves en 12 small thumbnail

Tsunami, The Great Waves

Available in English, Spanish, French and Chinese.


tsunami glossary 2013 thumbnail

Tsunami Glossary

Available in English, Arabic, Spanish, French and Bahasa. 



Where the First Wave Arrives in Minutes

Available in English, Bahasa, Spanish and French.


DVD copies for PC and Macintosh computers are available free of charge from the ITIC, Hawaii (

Hosted by:
UNESCO/IOC Project Office for IODE Oostende, Belgium
© 2015 International Tsunami Information Center | A UNESCO/IOC-NOAA Partnership
1845 Wasp Boulevard, Building 176, Honolulu, HI 96818, USA | Tel: +1 808 725 6050 | Fax: +1 808 725 6055