Tsunami early warning systems

Ocean watcher: An example of the 10 operational Deep-ocean Assessment and Reporting of Tsunamis (DART) buoys deployed in the Indian Ocean. — Pacific Marine Environmental Laboratory/NOAA Center for Tsunami Research

Technology has provided efficient tsunami early warning systems in the countries affected by the 2004 disaster. As memories fade, though, political will and financial commitments need to remain steadfast if the system is to continue working.

LIKE electronic tentacles, they sit anchored to the ocean floor kilometres below the surface, constantly measuring the vast volume of water around them for pressure changes that could indicate the build-up of a tsunami.