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Rebekah Shirey

on 1 March 2014

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Transcript of Krakatoa

The benefits:
Even though there are some dangers to living near volcanoes such as these there are also some benefits. If you like eating seafood, there tends to be abundant sea life near volcanic islands. There is very fertile soils near these volcanoes because of the volcanic ash from the eruptions. These soils allow for good farming. Volcanoes are also good spots for tourism, which in turn brings the towns lots of money. Another benefit to living near a volcano like this is that there are natural vents near the volcano, in the ground which then can be used to provide geothermal energy. These are a few of the benefits that come from living near a volcano like Krakatoa.
What you should know if you live near it?
The disadvantages to living near this volcano is that during a volcanic eruption earthquakes happen, and tsunamis may be created. Also, since it is a volcanic island, the island may be destroyed, and there is no escape.The lava flow is another danger because these are very slow moving, but destructive because they cannot be stopped and set fire to everything in their path.One more thing that one has to know is that there are pyroclastic flow which are impossible to outrun. These travel at about 300 km/h, and are extremely destructive to both humans and anything in their path. As one is preparing for an eruption the best thing to do is evacuate the area, and after the eruption takes place be sure that it is completely safe to re-enter that area before you return.

In the end
Krakatoa is a stratovolcano which is a tall, conical volcano with multiple strata of solidified lava (tephra) as well as volcanic ash.
How it formed:
Krakatoa formed when runny lava escaped through a fissure in the earths crust and spread out to create more or less an island.
Types of gases omitted:
carbon dioxide, volcanic gases, sulfer dioxide, etc...
located in the Sunda Strait between Java and Sumatra in Indonesia.
it formed around 416 AD.
: Krakatoa was nearly 5 by 9 Kilometers.
Last Eruption:
August to September of 2012 (Anak Krakatoa)
The Famous Eruption:
This volcano got its name because because the island it was formed on is called Krakatou and since it is the only mountain there it was named after the island.
Other Effects:
Average global temperatures were up to 1.2 degrees cooler for the next five years.
This eruption has a rating of 6 on the Volcanic Explosion Index and is estimated to have had the explosive force of 200 megatons of TNT.
The explosions hurled an estimated 11 cubic miles of debris into the atmosphere darkening skies up to 275 miles from the volcano; the dawn did not return for three days.
The shock waves in the atmosphere resulting from the explosions circled the planet at least seven times.
Volcanoes like Krakatoa give us a better understanding of how volcanoes can be extremely dangerous, powerful, and beneficial to the environment. It also allows for us to take experiences such as these and use them to be better prepared the next time an event like this happens.
One of the most famous of Krakatoa's eruptions was in August of 1883 and was one of the most deadly volcanic eruptions of history. On the morning of the 27th, four tremendous explosions, heard as far away Australia. Tephra and hot volcanic gases that were carried at speeds more than 62 mph killed many of the victims in western Java and Sumatra, but thousands more were killed by the devastating tsunami that was nearly 120 feet tall. The inhabitants of the coastal towns on Java and Sumatra fled toward higher ground to try and escape the tsunami. It is estimated that over 36,000 people died mainly as a result of thermal injury from the blasts and the tsunamis that followed the collapse of the volcano into the caldera below sea level. Within 13 days of the eruption, a layer of sulfur dioxide and other gases began to filter the amount of sunlight able to reach Earth. The atmospheric effects made for beautiful sunsets all over Europe and the United States. Within weeks, the rim of a new volcanic cone appeared above sea level. Within a year, it grew into a small island, which was named Anak Krakatoa, or Child of Krakatoa. Anak Krakatoa has continued to erupt periodically, although mildly.

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