The area covered by the warning included Japan, Russia, Marcus Island, North Marianas, Guam, Wake Island and Taiwan, as well as Yap, the Philippines, the Marshall Islands and Belau.
The warning was also posted for Midway Island, Pohnpei, Chuuk, Kosrae, Indonesia, Papua New Guinea, Nauru, Johnston Island, the Solomon Islands, Kiribati, Howland-Baker and Hawaii, as well as Tuvalu, Palmyra Island, Vanuatu, Tokelau, Jarvis Island, Wallis-Futuna, Samoa, and American Samoa.
Cook Islands, Niue, Australia, Fiji, New Caledonia, Tonga, Mexico, the Kermadec Islands, French Polynesia, New Zealand and Pitcairn were also affected.
The area covered by the warning also included much of Central America and South America, with Guatemala, El Salvador, Costa Rica, Nicaragua, Panama, Honduras, Chile, Ecuador, Colombia and Peru cautioned about possible tsunami dangers. The warning also covered Antarctica.