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Natural disasters around the world cause trouble for people and communities almost every day.
Cyclones are the most devastating of all, cyclones cause havoc. But cyclones can be very interesting.
What is a Natural Disaster?
A natural disasters is a disaster that is made by the earth or that is not man made these disasters include avalanches ,bushfires,floods,tornadoes,earthquakes,hurricanes,volcanic eruptions,tsnaumis and the world's deadliest disaster since 1742 the famous cyclone....
What is a cyclone?
A cyclone is a violent rotating windstorm. In meteorology, a tropical cyclone is a type of low-pressure system which forms in the tropics. The cyclone will often bring thunderstorms and a circulation of winds near the earth's surface, which is clockwise in the Southern Hemisphere and counter clockwise in the northern hemisphere.
How a cyclone is formed
In order for a cyclone to form, the ocean waters need to be warm at least 26 degrees or above. Above the warm ocean, water evaporates and forms clouds. If there is low air presssure where the clouds are formed,it pulls them in and they begin to rotate. It is the earths rotate. It is the earths rotation and spinning on it's axis that causes the cyclones clouds to rotate. Clouds will countinue to form and begin spinning more.
History of cyclones
Every October through to May is the annual cyclone season. We look back at some of the worst cyclones since 1899.
1899 - CYCLONE MAHINA (Category 5)
More than 400 people relished after Cyclone Mahina hit Bathurst Bay on 4 March 1899. The cyclone is considered to be the worst natural disaster in Australia's history. One hundred of the people who died were on pearling fleet
1918 - CYCLONE MACKAY (Category 4)
When the cyclone hit Mackay on 21 January, it destroyed all communication links into the town. Thirty people died in the tragedy, and the rest of the world didn't know anything about it until five days later.
1918 - CYCLONE INNISFAIL (Category 5)
On the 10th March 1918, when Innisfail, Qld was hit by a cyclone, it was a town of 3,500 people. Following the disaster, just 12 houses remained. Thirty-seven people died in Innisfail, while an additional 40-60 died in surrounding areas.
1971 - CYCLONE ALTHEA (Category 4)
Severe Tropical Cyclone Althea was at the time considered to be one of the strongest cyclones to affect the Queensland coast. There were three deaths in Townsville and damage costs in the region reached $50 million (1971 value). Many houses were damaged or destroyed, including 200 Housing Commission homes. On Magnetic Island 90 per cent of the houses were damaged or destroyed.
1974 - CYCLONE TRACY (Category 4)
Tracy, a Catefory4, struck Darwin in the Northern Territory on Christmas Eve 1974. It remains Australia's most destructive with winds of around 250km/h. Seventy-one people were killed, and many thousands injured. Of a population of 43,000, more than 25,000 were left homeless, according to the Australian government.
1975 - CYCLONE JOAN (Category 5)
Joan was a severe tropical cyclone with maximum measured wind gusts of 208km/h. It damaged 85 per cent of the houses in Port Headland, 600km south west of Broome, WA, and other settlements along its path. Subsequent flooding damaged roads and sections of the iron ore railways, particularly that of Hamersley Iron Pty Ltd. Sheep losses were heavy but there was no loss of human life or serious injury. The estimated damage to private property and public facilities is believed to have exceeded $25 million.
2007 - CYCLONE GEORGE (Category 5)
Severe Tropical Cyclone George was both very intense and physically large. George was the most destructive cyclone to affect Port Hedland, WA since 1975. Reported impacts include three fatalities and numerous injuries at location south of Port Hedland. Damage ws estimated at $6.2 million.
2011 - CYCLONE YASI (Category 5)
Cyclone Yasi crossed the Queensland coast at Mission Beach and Tully, south of Cairns. It is the worst cyclone to hit Australia since 1918, with 290km/h winds.
Warning Signs
Like most natural disasters cyclones are unpredictable. We cant just say a cyclone is going to happen in three weeks at 2pm. Monitoring devices can help us know if a cyclone is forming. The media is used to give us cyclone warnings and can give us an approximate time in say 4 to 8 hours or 24 hours away.
Affects on Living things from a cyclone
After the cyclone has hit it will have affected many people's lives. People are worried about their families and friends and hope that they are all safe. It takes years for people to rebuild their homes and their lives.
Affects on non-living things from a cyclone
Houses and entire villages are destroyed, like when Cyclone Bhola hit Pakistan, the homes were swept away and the debris from homes, full of furniture and even jet planes were found miles away in trees and in lakes.
Links to other Natural Disasters
Cyclones can cause other natural disasters like bushfires when trees fall on powerlines. This can also cause power outages across many homes. Cyclones can also cause flooding from the storm surges this would usually flood low-lying areas of islands.
How cyclones are measured
Cyclones of the southern hemisphere are measured by wind speed and assigned a category number. Whether or not they are classified as a cyclone is also determined by barometric pressure.
Wind speeds determine the category as follows:
Category 1: winds up to 125km/h
Category 2: 125- 170 km/h
Category 3: 170 - 225 km/h
Category 4: 225 - 280 km/h
Category 5: in excess of 280 km/h
Hurricanes, which are cyclones in the north-Western Hemisphere, are measured on the Safire-Simpson scale. The categories are measured as follows:
Tropical Storm - Winds 39-73 mph
Category 1 Hurricane - winds 74-95 mph
Category 2 Hurricane - winds 96-110 mph
Category 3 Hurricane - winds 111-130 mph
Category 4 Hurricane - winds 131-155 mph
Category 5 Hurricane - winds 156 mph and up
As you can see cyclones are the worst natural disaster ever
What else can I help you with?
Do cyclones occur on the moon?
No, cyclones do not occur on the moon. Cyclones are large-scale rotating storms that are driven by temperature differences in the Earth's atmosphere, which the moon lacks due to its lack of atmosphere.
Can two cyclones happen at once?
Yes. Extratropical cyclones happen all the time, and at times the Atlantic Ocean has had as many as 5 tropical cyclones at the same time. Right now (August 18, 2010) there are two tropical cyclones in the Pacific: Tropical Storm Fernanda and Hurricane Greg
What country do you get cyclones?
Cyclones occur in various countries around the world, predominantly in regions with warm ocean waters like the Pacific Ocean (e.g., Philippines, Japan) and Indian Ocean (e.g., India, Australia). Cyclones are also known as hurricanes or typhoons in different regions, depending on where they form.
Are cyclones geological?
No, cyclones are not geological phenomena. Cyclones are atmospheric phenomena characterized by low pressure systems with rotating winds, often resulting in strong winds, heavy rain, and storm surge. Geology, on the other hand, is the study of Earth's physical structure, history, and the processes that shape it.
What are hurricanes called in other parts of the world?
In the Pacific they are called typhoons. Generically, hurricanes and typhoons are both tropical cyclones. A tropical cyclone is the generic term for a non-frontal, synoptic scale, low-pressure system over tropical or sub-tropical waters with organized convection (i.e. thunderstorm activity) and definite cyclonic surface wind circulation.
Are cyclones good?
No, Typhoons are very bad.
What kind of natural disasters can happen in sri lanka?
Earthquakes, tsunamis, cyclones and and bad weather.
What are cyclones called in Europe?
Cyclones in Europe are known as cyclones. They are not called hurricanes - this is a term generally reserved for cyclones in the Americas.
Are there any cyclones in Japan?
Yes, Japan does have cyclones. The term for cyclones in this area of the world is typhoons.
Are cyclones similar to tusnaimis?
No. Cyclones are similar to hurricanes.
How many cyclones have happend in the US?
there was alot of cyclones at the US
How tall are cyclones?
Cyclones can easily be several kilometres in height.
What year do cyclones hit?
Cyclones occur every year.
Do cyclones have tornadoes in them?
Some cyclones produce tornadoes, but most do not.
When was Jacksonville Cyclones created?
Jacksonville Cyclones was created in 1995.
When was Cincinnati Cyclones created?
Cincinnati Cyclones was created in 1990.
When was Brooklyn Cyclones created?
Brooklyn Cyclones was created in 1986.
