Monday, September 21, 2009

Monday, September 14, 2009

Tsunamis

Tsunamis are often called tidal waves. This is misleading, because tsunamis are not related to waves. Caused by earthquakes or volcanic activity. It can be hundreds of kilometers in length. It is a chain of fast moving waves caused by fast changes in the ocean. Usually, a tsunami starts suddenly. It will begin as normal waves and change to a very big wave very quickly. The waves travel across an ocean without losing energy. They can remove sand from beaches, destroy trees, damage houses and even wipe out whole towns. If the slope of the coast is shallow, the water may pull back for many hundreds of metres. People who do not know of the danger will often remain at the shore. Tsunamis can not be prevented, but there are ways to help stop people from dying from a tsunami. An earthquake that caused the tsunami can be felt before the wave gets to the shore, people can be warned to go somewhere safe mainly high up land such as mountains.
Drawbacks are a brief warning of a Tsunami; many survivors say that the drawback is followed by a sucking sound. People, who observe drawback, can survive only if they immediately run for high ground.

Friday, September 11, 2009

If you notice more than one of the warning signs it’s time to take cover. When it comes to tornadoes, it’s better to be safe than sorry and since you can’t outrun them, you’d better shield yourself from them as much as possible .

Tornadoes are born in thunderstorms and are often accompanied by hail. Giant, ongoing thunderstorms are called supercells spawn the most destructive tornadoes. These violent storms occur around the world, but the United States of America is a major hotspot with about a thousand tornadoes every year.

Tornadoes are rapid air masses that spin around vertically to the ground, their winds speeds may get up to 250 miles (400 kilometres) an hour and can clear a pathway in a miles radius and get up to 50 miles in height. Most tornadoes last only two or three minutes, but the ones on the news normally last up to fifteen minutes.

The terrain underneath it base does not affect tornadoes. i.e. (they can occur in mountainous areas or flat land areas). Tornadoes can very in colour,their mostly white, black or grey it depends how the light hit it. Tornadoes often occur on the west side of a thunderstorm.

Tornado Alley, a region that includes (eastern South Dakota, Nebraska, Kansas, Oklahoma, northern Texas, and eastern Colorado), are home to the most powerful and destructive of these storms. Tornadoes in the USA cause 80 deaths and more than 1,500injuries per year.

There are five main signal you have to look for

1.The sky will suddenly turn a dark greenish colour.

2.Hail stones will start to fall from the sky they can very in sizes.

3.If you see a cloud of debris,coming towards you that mean the torndoe is not far away so you have little time to get to safty.

4.Many people think that a tornadoe comes with raging wind and hail. NO in many cases tornadoes come in quiet and stillness.

5.If you hear a tornadoe siren it doesn't mean a tornadoe is coming it means that take cover as fast as you because you mite not have time left to hide.

Thursday, September 10, 2009

Introduction

I hope you will be able to put the information on my blog to good use. By reading my blog I hope it will make it easier to identify storms, hurricanes, etc. By looking for the smallest of signs mite make a big difference.


source's

the video of my blog is from google video's
the picture on my blog is from google image's source