A Tsunami Warning System must alert all persons on every vulnerable coast of imminent danger, covered by the system. The response of such a system must be rapid (as soon as possible), accurate (minimize false warning), reliable (continuous operation), effective (to save lives). UN-ISDR Framework for effective Early Warning Systems encompass four critical linked elements;
1. Detection, Monitoring and Warning Service (Technical Monitoring and Warning Service)
2. Risk Knowledge (Awareness of the Risk)
3. Dissemination and Communication (Dissemination of meaningful warnings to Persons and Communities at Risk)
4. Response Capability (Public Awareness and Preparedness to Respond)