Up to 28 countries will help test a new tsunami warning system in the Pacific this month.
A mock tsunami warning call in Hawaii will launch the drill on May 16th.
The information will be sent to national emergency authorities in each cooperating country across the vast region.
The drill is being organized by UNESCO, which says it will be the first such exercise of its kind.
Countries coordinating the Pacific Wave 2006 exercise include Australia, Chile, Fiji, New Zealand, Nicaragua, Russia, Samoa and the United States.