Criteria for issuing Weather Alerts and warnings for the Earthquake and Tsunami in Maldives

Criteria for issuing Weather Alerts

Alert Level	Description	Action
1 White	Mean wind speed is expected or prevail between 20-30 mph Rainfall of more than 50mm is expected to occur within 24 hours High tidal waves are expected	Weather information, but no immediate threat
2 Yellow	Mean wind speed is expected or prevail between 30-40 mph Torrential rain is expected and if heavy rain occurs for more than 2 hours A severe thunderstorm is expected or experienced Tropical cyclone is formed within effective areas of Maldives Significant tidal or swell waves are expected or experienced	Concern authorities and people living in the area to be on alert and ready to take action. Travel by sea is not advisable
3 Red	Flash flood is expected A tropical cyclone is tracked to move closer or cross Maldives islands Destructive tidal or swell waves or storm surge is expected or observed	Evacuation of population from threatened areas to safer places. Prohibition of sea transport
3 Green	The condition has improved	Cancel Warning

Criteria for issuing Alerts and Warnings for

the Earthquake and Tsunami

Alert Level	Description	Action
1 White	An earthquake of 7.0 or higher in Richter scale, occurred in the Indian Ocean ring but there is no immediate threat from the event	Earthquake information
2 Yellow	An earthquake of 8.0 or higher in Richter scale, occurred in the Indian Ocean ring and has the potential to generate an ocean wide destructive tsunami in the Indian Ocean	Earthquake and Tsunami advisory, concerning authorities and public are advised to be on alert and be ready to move safer areas and high buildings
3 Red	An earthquake of 8.0 or higher in Richter scale, occurred in the Indian Ocean ring and confirmation of an ocean wide destructive tsunami originated from the epicenter	Tsunami warning. People evacuated from the danger zones
3 Green	The condition has improved	Cancellation message, MMS assume that the tsunami threat does not exist to Maldives