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A tsunami spawned by the Japan earthquake washed away houses and cars in Miyagai Prefecture.
In light of Friday's tsunami following the Japan earthquake, find out how the killer waves are caused, what the warning signs are, and how to respond when a tsunami threatens.
A huge tsunami spawned by the magnitude-8.9 quakea€”one of the largest ever recordeda€”rocked Japan's eastern coast, killing hundreds of people, according to the Associated Press. Scientists say that a great earthquake of magnitude 9 struck the Pacific Northwest in 1700 and created a tsunami that caused flooding and damage on the Pacific coast of Japan.
The Indian Ocean tsunami of December 2004 caused waves as high as 30 feet (9 meters) in some places, according to news reports.
The most damaging tsunami on record before 2004 was the one that killed an estimated 40,000 people in 1782 following an earthquake in the South China Sea. North Atlantic tsunamis include the tsunami associated with the 1775 Lisbon earthquake, which killed as many as 60,000 people in Portugal, Spain, and North Africa. Many people were killed by the Indian Ocean tsunami because they went down to the beach to view the retreating ocean exposing the seafloor.
Boat owners may want to take their vessels out to sea if there is time and if the sailors are allowed to do so by port authorities. No further bulletins will be issued by ITEWC INCOIS for this event unless additional information becomes available.
A tsunami is a series of ocean waves that sends surges of water, sometimes reaching heights of over 100 feet (30.5 meters), onto land.
The day after Japan's biggest earthquake, cities smoldered, soldiers lent helping hands, and a nuclear reactor exploded.
The biggest earthquake in Japan's history Friday sparked three-story waves, hundreds of casualties, and towering infernos. In light of Friday's tsunami following the Japan earthquake, find out how the killer waves are caused, what the warning signs are, and how to respond when a tsunami threatens.
The deadly earthquake that struck Japan Friday sent a tsunami racing across the Pacific Ocean, reaching Hawaii, the Pacific Northwest, and California.
The two nearly simultaneous events might have been triggered by the same earthquake, which may have been a rare "slow" temblor, experts say.
Southern California, Seattle, and Taiwan are some of the places where tsunamis may be more likely than thought, a new study says.
Catch a glimpse of wildfires from a rare perspective, as firefighters open a window into their world. Unlike earthquakes, which are often followed by aftershocks, the storms that birth tornadoes are independent of one another. See heroic firefighters and breathtaking devastation shared with the #wildfire2014 tag on Your Shot.
Twisters across much of the South and Midwest highlight seasonal dangers in vast strike zone.
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Churning waters retreat from the battered coast of Kalutara, Sri Lanka, after a tsunami hit coastal areas throughout the Indian Ocean on December 26, 2004.


A Sri Lankan woman collects personal items as her husband surveys damage to their coastal Colombo home two days after a tsunami swept through the Indian Ocean.
A man walks through the rubble of a house in Dichato, Chile, after an April 2010, 8.8-magnitude earthquake caused tsunamis that damaged coastal towns. Twelve-year-old Fathma Nusrat stands amid debris near her home in Galle, Sri Lanka, following the December 2004 Indian Ocean tsunami. Stripped of foliage, trees on India's Great Nicobar Island stand in pools left by the 2004 tsunami.
Acres of rubble surround an Indonesian man carting merchandise from his damaged shop in Banda Aceh six days after the 2004 tsunami overwhelmed coastal Indian Ocean towns with waves as high as 30 feet (9 meters).
An aerial view of Batticaloa, Sri Lanka, shows a debris-littered landscape after the 2004 Indian Ocean tsunami swept the coastline. Scientists are able to calculate arrival time of a tsunami in different parts of the world based on knowledge of water depths, distances, and when the event that generated the tsunami occurred. But the powerful shock wave of energy travels rapidly through the ocean, sometimes as fast as a commercial jet.
The enormous energy of a tsunami can lift giant boulders, flip vehicles, and demolish houses. In 1883 some 36,500 people were killed by tsunamis in the South Java Sea, following the eruption of Indonesia's Krakatoa volcano. Some were generated locally and others were the result of events far away, such as the 1775 earthquake near Portugal.
If you see the ocean receding unusually rapidly, that's a good sign that a tsunami may be on its way.
Experts believe that a receding ocean may give people as much as five minutes' warning to evacuate the area.
Do not assume that because there is minimal sign of a tsunami in one place it will be like that everywhere else. Stay away from rivers and streams that lead to the ocean as you would stay away from the beach and ocean if there is a tsunami. Tsunamis can cause rapid changes in water level and unpredictable, dangerous currents in harbors and ports. Only national, state, district administrators and disaster management offices have the authority to make decisions regarding the official threat status in their coastal area and any action to be taken in response.
These walls of water can cause widespread destruction when they crash ashore.These awe-inspiring waves are typically caused by large, undersea earthquakes at tectonic plate boundaries. When individuals pledge to use less water in their own lives, our partners carry out restoration work in the Colorado River Basin. Please listen to your local radio and TV announcements or call 1300 TSUNAMI (1300 878 6264) for latest warning information. The tsunami was triggered by an underwater 9.0-magnitude earthquake between the Indonesian island of Sumatra and the Indian Andaman Islands.
The wave devastated coastal communities, wiping villages off the map and carrying boats onto unfamiliar, dry territory. Officials estimated that the tsunami forced more than one million Sri Lankans from their homes. Dichato is on the Pacific coast approximately 43 miles (70 kilometers) south of the epicenter of the earthquake.


The 2004 Indian Ocean tsunami traveled as far as 3,000 miles (nearly 5,000 kilometers) to Africa, arriving with sufficient force to kill people and destroy property.
In other places tsunamis have been known to surge vertically as high as 100 feet (30 meters). This may be accompanied by much underwater turbulence, sucking people under and tossing heavy objects around. But tsunamis have been generated in other bodies of water, including the Caribbean and Mediterranean Seas, and the Indian and Atlantic Oceans. If you hear of an earthquake be aware of the possibility of a tsunami and listen to the radio or television for additional information. A tsunami wave train may come as a series of surges that are five minutes to an hour apart. Geological Survey, and the Federal Emergency Management Administration to initiate a program to predict tsunamis more accurately. An international warning system for tsunamis in the Indian Ocean was launched in June 2006. Now Geneva Software Technologies has developed a technology to alert people from such disasters. The earthquake that caused the Chile tsunami was powerful enough to move the entire city of Concepcion ten feet to the west and shorten the Earth's rotation. Remember that an earthquake can trigger killer waves thousands of miles across the ocean many hours after the event generated a tsunami.
As a tsunami traverses the ocean, a network of sensitive recorders on the sea floor measures pressure changes in the overhead water, sending the information to sensors on buoys, which in turn relay the data to satellites for immediate transmission to warning centers. They may even be launched, as they frequently were in Earth’s ancient past, by the impact of a large meteorite plunging into an ocean.Tsunamis race across the sea at up to 500 miles (805 kilometers) an hour—about as fast as a jet airplane.
Designed to reach the maximum people in minimum time it can especially help the rural people and fisherman community to get messages in their local language. And their long wavelengths mean they lose very little energy along the way.In deep ocean, tsunami waves may appear only a foot or so high. But as they approach shoreline and enter shallower water they slow down and begin to grow in energy and height. The tops of the waves move faster than their bottoms do, which causes them to rise precipitously.A tsunami’s trough, the low point beneath the wave’s crest, often reaches shore first. When it does, it produces a vacuum effect that sucks coastal water seaward and exposes harbor and sea floors. This retreating of sea water is an important warning sign of a tsunami, because the wave’s crest and its enormous volume of water typically hit shore five minutes or so later.
Recognizing this phenomenon can save lives.A tsunami is usually composed of a series of waves, called a wave train, so its destructive force may be compounded as successive waves reach shore. The Pacific Tsunami Warning System, a coalition of 26 nations headquartered in Hawaii, maintains a web of seismic equipment and water level gauges to identify tsunamis at sea.



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