Home >>

Precautionary Measures Before, During and After Tsunamis
Published By joeldgreat on 2012-02-23 4227 Views


An earthquake on December 26, 2004 shook the ground violently and unleashed a series of huge killer waves across the Indian Ocean at enormous speed. This killed 150,000 persons at the end of that day. Others were reported missing. It also left millions of people homeless in 11 countries. The epicenter of the quake, with a 9.0 magnitude, was under the Indian Ocean near the Indonesian Island west coast, the island of Sumatra.


An earthquake on December 26, 2004 shook the ground violently and unleashed a series of huge killer waves across the Indian Ocean at enormous speed. This killed 150,000 persons at the end of that day. Others were reported missing. It also left millions of people homeless in 11 countries. The epicenter of the quake, with a 9.0 magnitude, was under the Indian Ocean near the Indonesian Island west coast, the island of Sumatra.

The earthquake was a result of the sliding of the earth’s crust, specifically the India plate under the section called Burma plate. Above the sea floor a great volume of water was displaced along the fault line where the rupture occurred. The killer waves slammed into the coastline of 11 countries in the Indian Ocean, pulling people into the ocean and drowning them, and demolishing properties.
A tsunami is a Japanese word meaning “harbor wave”. In a tsunami, a vast body of water is rapidly displaced, and a series of waves created. This motion of seawater is the source of its destructive power. The waves could be as high as 10 meters.

Have you heard about or seen a tsunami? This can be triggered by volcanic eruptions, earthquakes, landslide, or even by the impacts of meteorites on earth. Tsunamis may also be caused by underwater explosions or nuclear weapon testing in the seas.

How a tsunami occurs

Throw a stone in a pond or lake. Notice a series of concentric ripples. A tsunami is just like those ripples, except that they come in about 10-meter waves. Earthquakes, volcanic eruptions, undersea landslides, and other causes mentioned above cause tsunamis. Since the momentum of the waves is so great, a tsunami that occurred in the Indian Ocean traveled as much as 5000 kilometers to Africa still had enough force to kill 150,000 people and destroy properties. As the waves hit the shore, they become higher, since the shores are shallower.

Signs that s Tsunami is Approaching

There are some signs that could warn you if a tsunami is going to happen. Take note of the following:

1. If an earthquake occurs near a body of water.
2. If water along a shoreline recedes dramatically.
3. Some kinds of animals hear the noise of tsunami and move towards the opposite direction towards inland.
4. When you hear a loud roar similar to that of a train or an airplane.

The tsunami warning system consists of sensors that can detect tsunamis and communications system that could alarm to allow evacuation of coastal areas. Since tsunamis move at 0.14 to 0.28 km/s and earthquake waves at 4 km/s, it is assumed that, when an earthquake is confirmed, there is enough time to predict a tsunami.

To reduce the effect of a tsunami, a tsunami wall of 4.5 meters in height can be constructed in populated coastal areas. Floodgates and channels can be built to redirect the water from the tsunami, and the shore can be covered with trees. All these slow down and moderate a tsunami. However, they cannot totally prevent the destruction and loss of life.

Before a tsunami

Watch out for warning signs. Remember to run uphill when you are near the shore and you felt an earthquake, when you observe animals heading uphill or away from the shore, or when you observe the water at the beaches recede into the sea.

During a Tsunami

If you run uphill on the first warning signs, you will probably have enough time to reach safe high ground. If not, the only thing you can try is to climb up a tree, although there is no assurance that the water will not reach you. The best thing is to run at the first warning signs or when an evacuation announcement has been made.

After a Tsunami

You will have to wait for some time to make sure there are no other waves coming after the first wave before you clear up the debris. A tsunami is a series of waves. The first wave may not be the most dangerous. The waves may come five minutes apart to an hour apart. The cycle may be marked by repeated retreating and advancing of the ocean or sea. Do not go to the shore once the first wave has gone. Expect more to come.

If you find this article interesting, you might also want to read these:

http://expertscolumn.com/content/all-you-have-know-about-tides

http://expertscolumn.com/content/recognizing-causes-climate

http://expertscolumn.com/content/simple-ways-stop-global-warming
 

Post Comment Comments (0) Report This

More Articles Specially Recommended for You:

How to Check a Plagiarized Content

This is a very simple way on how to check if your article is plagiarized or copied by other person. A good way to check if other's work is p

Written By : joeldgreat
How to Cope Stress with Vitamin C

Everyday life can be tiring, physically as well as emotionally. Physical stress is common among those who do hard work for long periods. Vitamin

Written By : joeldgreat
Understanding the Difference between Computer Software and Hardware Technicians

My simple tips on how to distinguish a Software technician and Hardware technician. One can also read which of the two jobs best suited for you.

Written By : joeldgreat
How to Survive the College Life

College life can be tough. Here is some of my tips on how to survive it.

Written By : joeldgreat
How Does a Radar Works

Explaining the concepts behind the radar system and how it forecasts weather. Long ago, people tried to make weather forecasts based on folklore

Written By : joeldgreat
Muscle Cars Still Reign Supreme

During the 1950ís and 1960ís the big motor companies were in the middle of a car revolution. The nation was turned upside down with people buying musc

Written By :nikmahajan
Lost Planet 2 Playstation 3 (PS3) Version Confirmed

After lots of speculations, Lost Planet 2 Playstation 3 version is finally confirmed. There is no reason left now to deny Lost Planet 2 for PS3 as

Written By :nikmahajan
Lays Chips HARAAM: Propaganda or Truth?

Some days back I received on SMS and an Email saying that, Lays Chips (Masala Flavor) is HARAAM. On the back of the Lays chips “E631 Fat”

Written By :ubpl
VolksWagen Polo - The Same But Different

Despite the facts that the new VolksWagen Polo resembles the old one and that it is also similar to the VW Golf MkVI it is indeed an all new vehicle.

Written By :nikmahajan

COMMENTS



LogIn or SignUp! now to post your comments for this article.