Can you survive underwater in a tsunami?

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Oct 17, 2016

    Prashant Mor Oct 17, 2016

    “I sometimes wondered what’ll happen if any disaster came? Will we all be dead? It really really made me very tensed but this article has relaxed my mind. It’s gorgeous. A special thanks to wikiHow.” …” more

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What To Do If A Tsunami Is About To Hit And You Are On A Boat

1. If you are in the open ocean, do not return to port. Harbors and the coast are often dangerous places during a tsunami.2. If you are in port, it might be advisable to communicate with the harbor authority (if there is one) on what to do.

3. If you are in port and there is no harbor authority to rely on, owners of small boats might be advised to leave their vessels and move to higher ground. Owners of bigger boats will have to decide whether they have the time and desire to move their boat to deeper water in a calm and orderly manner.

Survive DURING

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If there is an earthquake and you are in a tsunami area, protect yourself from the earthquake first. Drop, Cover, and Hold On. Drop to your hands and knees. Cover your head and neck with your arms. Hold on to any sturdy furniture until the shaking stops. Crawl only if you can reach a better cover, but do not go through an area with more debris.When the shaking stops, if there are natural signs or official warnings of a tsunami, move immediately to a safe place as high and as far inland as possible. Listen to the authorities, but do not wait for tsunami warnings and evacuation orders.If you are outside of the tsunami hazard zone and receive a warning, stay where you are unless officials tell you otherwise.Leave immediately if you are told to do so. Evacuation routes often are marked by a wave with an arrow in the direction of higher ground.If you are in the water, then grab onto something that floats, such as a raft or tree trunk.If you are in a boat, face the direction of the waves and head out to sea. If you are in a harbor, go inland.

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Meteor Impacts And Volcanos Can Also Cause Tsunamis

Though earthquakes and underwater landslides are usually the precursors to tsunamis, really anything that causes great movement or impact on the ocean floor can cause them (an asteroid impact, for example). Further, the first wave to hit home on land usually isn’t the worst of spite the fact that the amplitude of a tsunami is usually very small in the open ocean ( making tsunamis hard to detect with the naked eye ) when they are about to touch down on land, their height increases. Oftentimes upon landfall they reach 10-20 feet in height, but severe tsunamis have reached heights greater than 100 feet. Of course, a tsunamis’ speed decreases as it is about to impact with the land.

Last, low lying communities are at most risk for damage from these natural disasters waiting to happen. In fact, the word tsunami comes from the Japanese word for “harbor wave.” Thus, they are quite well known in that area of the world for destroying many of Japan’s low lying harbors throughout their history.

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How is a tsunami formed?

A tsunami can be formed in a number of different ways, but usually there are three things that have to happen.

An earthquake must measure at least 7.0 on the Richter scale, the sea bed must be lifted or lowered by the earthquake, and the epicentre of the earthquake must be close to the Earth's surface.

Earthquakes, volcanic eruptions, underwater explosions, landslides, meteorite impacts and other disturbances above or below water can potentially generate a tsunami.

While normal waves are caused by the winds as well as the Moon and the Sun, a tsunami is always caused by the displacement of a large body of water.

Tsunamis are sometimes called tidal waves, although this term is not popular among experts as they are not actually influenced by the tides at all.

What harm can a tsunami do?

A tsunami can kill or injure people and damage or destroy buildings and infrastructure as waves come in and go out. A tsunami is a series of enormous ocean waves caused by earthquakes, underwater landslides, volcanic eruptions, or asteroids. Tsunamis can: Travel 20-30 miles per hour with waves 10-100 feet high.

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