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What do the different tsunami messages mean ( Warning / Watch / Advisory / Information )?

April 26, 2017advisory different mean Messages tsunami warning WATCH

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What do the different tsunami messages mean ( Warning / Watch / Advisory / Information )?

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West Coast and Alaska Tsunami Warning Centre (WCATWC) Message Definitions Data from selected NRCan seismometers are forwarded to the National (United States) Oceanic and Atmospheric Administrations (NOAA) West Coast and Alaska Tsunami Warning Centre (WCATWC) in Palmer, Alaska. This information is integrated with other seismic, tide gauge, and deep ocean buoy system data to produce tsunami information statements, alerts, watches, or warnings for all North American coastlines (including the Atlantic and Arctic). WCATWC distributes these messages to Emergency Measures Organizations (EMO) and other clients 5 to 15 minutes after a potentially tsunamigenic earthquake has occurred and provide updates at regular intervals. WCATWC product definitions changed to the definitions provided below on February 12, 2008. The products issued by the center are warning, watch, advisory, and information statements. Each has a distinct meaning relating to local emergency response.