All about Tsunamis for Kids

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Tsunamis 101

Tsunamis travel approximately mph in 15, feet of water. In feet of water the velocity drops to about 40 mph.

Did you know…A tsunami travels from the central Aleutian Islands to Hawaii in about 5 hours and to California in about 6 hours, or from the Portugal coast to North Carolina in about 8. How big is a tsunami?

Learn all about these mammoth forces of nature!

Tsunamis range in size from inches to over a hundred feet. In deep water greater than feet , tsunamis are rarely over 3 feet and are not normally noticed by ships due to their long period or time between crests. As tsunamis propagate into shallow water, the wave height can increase by over 10 times.

Tsunami heights vary greatly along a coast. The waves can be amplified by shoreline and sea floor features. A large tsunami can flood low-lying coastal land over a mile from the coast. What does a tsunami look like when it reaches shore? Normally, a tsunami appears as a rapidly advancing or receding tide.

What is a Tsunami?

In some cases, a wall of water or series of breaking waves may form. How is a tsunami different from a wind-generated wave? Wind-generated waves usually have periods or time between crests between 5 and 15 seconds. Tsunami periods normally range from 5 to 60 minutes.

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Also, wind-generated waves break as they shoal and lose energy offshore. Tsunamis act more like a flooding wave. A twenty foot tsunami is a twenty foot rise in sea level. Tsunamis may be accompanied by loud, booming noises. Can earthquakes and tsunamis be predicted? No, earthquakes cannot be predicted. Once an earthquake has occurred, the arrival time of a tsunami, if generated, can be determined accurately.

There is not normally enough time to accurately predict tsunami heights near the source. Most tsunami waves are less than 10 feet 3 meters. Take precautions to prevent flooding. Have an engineer check your home and advise about ways to make it more resistant to tsunami water. There may be ways to divert waves away from your property. Improperly built walls could make your situation worse. Make a list of items to bring inside in the event of a tsunami watch or warning being issued for your area.

During a Tsunami.

After a Tsunami. If evacuated, return only when authorities say it is safe to do so. Avoid disaster areas. Your presence might hamper rescue and other emergency operations and put you at further risk from the residual effects of the tsunami, such as contaminated water, crumbled roads, landslides, mudflows, and other hazards. It may take days, weeks, or months for the aftershocks to subside.

Pay attention to how you and your loved ones are experiencing and handling stress. Watch animals closely and keep them under your direct control. Returning home safely. Stay out of damaged buildings and those surrounded by water. Tsunami water, like floodwater, can undermine foundations, causing buildings to sink, floors to crack, or walls to collapse. Check food supplies. Any food that has come in contact with floodwater may be contaminated and should be thrown out.

Tsunami facts: check out the mighty wave!

Watch out for fallen power lines or broken gas lines and report them to the utility company immediately. If you smell gas or hear a blowing or hissing noise, open a window and get everyone outside quickly. Turn off the gas using the outside main valve if you can, and call the gas company from a neighbor's home.

Cleaning and repairing your home. Wear protective clothing, including long pants, a long-sleeved shirt and sturdy shoes, and be cautious. If your home has been flooded: Shovel out any mud before it solidifies. Open the windows and doors to help dry the building. Ask a professional to. Check your home and advise about ways to make it more resistant to tsunami water or even divert waves away from your property.

Tsunami Fact vs Fiction. Tsunami Fact vs Fiction Fiction Tsunamis are giant walls of water. Fact Occasionally, tsunamis can form walls of water known as tsunami bores but tsunamis normally have the appearance of a fast-rising and fast-receding flood. Fiction A tsunami is a single wave. Fact A tsunami is a series of waves. Fiction Boats should move to the protection of a bay or harbor during a tsunami. Fact Tsunamis are often most destructive in bays and harbors, not just because of the waves but because of the violent currents they generate in local waterways.

These waves can travel thousands of miles and reach enormous heights. Since they can travel great distances, people far away can be affected by tsunamis. For example, an earthquake in Japan can cause a tsunami that affects the coastline of California. Since tsunamis are caused by earthquakes, they usually originate along plate boundaries. Tsunamis can cause a great deal of flooding, which causes a lot of damage as well as loss of life. Scientists are working on better ways of predicting when and where tsunamis may occur and installing warning systems to protect us.

Kids Ahead - Subjects - Tsunamis & Floods

Some homes are made with stone, since stone has a very high melting temperature and can withstand a lot of heat. In earthquake zones, buildings that are closer to the ground experience less destruction than tall, thin buildings. Engineers take this into account when designing buildings. For example, in California, most schools are built with only one level, so they can withstand damage during earthquakes. In areas of the country that are not in earthquake zones, schools can be built with multiple floors.

In areas with volcanoes, engineers have designed homes with steep roofs so volcanic ash can slide off more easily. The roofs are also strong enough to withstand the added weight from the ash. In areas with earthquakes, engineers have designed skyscrapers that sway on purpose when the Earth moves.

This adds stability and prevents damage when the Earth shakes. Storm shutters are used to prevent windows from breaking during disasters like a hurricane. Flying debris can break windows or even hurt people inside. Natural Disasters Made Easy!

All about Tsunamis for Kids All about Tsunamis for Kids
All about Tsunamis for Kids All about Tsunamis for Kids
All about Tsunamis for Kids All about Tsunamis for Kids
All about Tsunamis for Kids All about Tsunamis for Kids
All about Tsunamis for Kids All about Tsunamis for Kids
All about Tsunamis for Kids All about Tsunamis for Kids

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