All ocean-wide tsunamis have been generated by major earthquakes. FAQ Contact Us. Kid's Wave! Calendar News. What is CTIC? Dependent on the distance of the tsunami from its source, it may be classified as a: Local tsunami: A local tsunami is one that originates from within about km or less than 1 hour tsunami travel time from the impacted coastline. Distant tsunami: Are generated from a long way away, such as from across the Pacific in Chile.
In this case, we will have more than three hours warning time for New Zealand. Regional tsunami: Are generated between one and three hours travel time away from their destination. An eruption from an underwater volcano in the Kermadec Trench to the north of New Zealand, could generate a regional tsunami. Local tsunami: Are generated very close to New Zealand. This type of tsunami is very dangerous because we may only have a few minutes warning. Tsunami Warnings Warning messages and signals about a possible tsunami can come from several sources — natural, official or unofficial.
It is important to recognise the natural warning signs and act quickly. Official warnings: Official warnings are only possible for distant and regional source tsunami. Also on 15 November Mindoro Earthquake also generated tsunamis that left 49 casualties. Each one of us in the community should learn some important Tsunami Safety and Preparedness Measures such as the following:.
Do not stay in low-lying coastal areas after a felt earthquake. Move to higher. If unusual sea conditions like rapid lowering of sea level are observed,. Never go down the beach to watch for a tsunami. When you see the wave, you are. During the retreat of sea level, interesting sights are often revealed. Fishes may be. Also sandbars and. These scenes tempt people to flock to the shoreline. The diagrams shows how tsunamis are generated when an earthquake occurs under the sea.
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