`` Reports of broken or even deliberately destroyed system units are entirely unfounded , '' it added . The tsunami followed a 7.7-magnitude earthquake off the Indonesian island of Sumatra . A German organization involved in maintaining the tsunami warning system says it worked . Tsunami Warning System - Germany : This is an interactive map that shows where tsunamis are expected to hit and how far they can travel inland.
The tsunami followed a 7.7-magnitude earthquake off the Indonesian island of Sumatra . A German organization involved in maintaining the tsunami warning system says it worked . Tsunami Warning System - Germany : This is an interactive map that shows where tsunamis are expected to hit and how far they can travel inland.