Establishment and purpose of PTWS

 

The Intergovernmental Coordination Group for the Pacific Tsunami Warning and Mitigation System (ICG/PTWS) was established in 1965 through Resolution 6 at the Fourth Session of the Intergovernmental Oceanographic Commission General Assembly.  The ICG/PTWS first convened in 1968, and was called the International Coordination Group for the Tsunami Warning System in the Pacific (ITSU) until its name change in 2005.  The main purpose of the gGoup is to coordinate international tsunami mitigation activities, including the dissemination of timely tsunami warnings, watches, and advisory bulletins throughout the Pacific to member states in accordance with procedures outlined in the PTWS Operational Users Guide (formerly called its Communications Plan).

Link to ICG/PTWS Sessions

Year Document Description  Format/Size
1965 IOC Resolution 6 Establish ICG/ITSU with ITIC (PTWC) PDF (197 KB)
1968 ICG/ITSU-I Summary Report PDF (254 KB)
1974 ICG/ITSU-IV ITIC Associate Director PDF (169 KB)
1977 IOC-X.23 ITIC Mandate & Functions PDF (104 KB)
1978 ICG/ITSU-XI.3 ITIC Mandate & Functions, Amendment PDF (43 KB)
2005 ICG/ITSU-XX, Summary Report Name Change from ICG/ITSU to ICG/PTWS, Establish Japan NWPTAC PDF (741 KB) 
2013 ICG/ITSU-XXV Summary Report, Proposal accepted for China SCSTAC PDF (1.14 MB)
2014 IOC CL 2535 PTWC cease issuing Warnings, start issuance of PTWC Enhanced Products PDF (237 KB)
2018 IOC CL 2706 SCSTAC start of trail operations PDF (2.92 MB)
2019 IOC CL 2753 NWPTAC changeover to NWPTAC Enhanced Products PDF (371 KB)

 

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