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).
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) |