Volcanoes have been called majestic by some people. However, for others who’s lives have been devastated by the fire spitting mountains, view them as a curse. In your history book, you may see pictures of the ruin that Mt. Vesuvius wrought on Pompei, in fact many people have traveled to Pompei just to see these very ruins that many people fled from those many years ago when the eruption started.
There are many different shapes of volcanoes, such as the Stratovolcanoes, which slope gently inward until the top where the angle upwards sharply. There are also the shield volcanoes, which appear to be gentle hills, until they erupt that is. Scoria cone volcanoes are numerous, they are like small cones. Volcano eruptions most are most commonly seen in the ‘Pacific ring of fire’-which is an area encircling the Pacific basin-where there are a total of 452 volcanoes.
All volcanoes have two basic parts, the vent, or crater, which is where the magma, or the pressure in the earth’s crust escape. They also all have a conduit, which is basically a ‘magma transport tube’, most volcanoes also have magma, but I’m sure you knew that. Some volcanoes also have something called parasitic cones, which are cones that are stuck to the volcano’s sides, and also have a vent, allowing more magma to escape.
Volcano eruptions are caused when the earth’s crust has pressure under
it, and the magma rushes around to find somewhere else to go, volcanoes are ideal for it’s purpose. Sometimes the pressure build-up isn’t strong enough to push the lava up all the way, in which case the magma settles back down, releasing gases as it goes down. The gases are sometimes enough to cause that eruption, sometimes it isn’t. If the gas isn’t enough, then the magma waits patiently until some more magma happens along, until there is enough for, well… I’m sure you get the idea.
When volcanoes erupt, it can cause people in the surrounding area
scrambling for a safer place to be, their actions are justified, as volcanoes are a deadly force of nature. Houses are usually covered in ash, which can cause the roof to collapse, especially if it is wet ash. Roads and fields also get covered in ash, ash also makes it hard to breathe. Lava flows will knock down houses, and trees, and lava flows will also cover roads. However, lava flows are usually too slow to kill people. Volcanic gases aren’t normally deadly however the gases caused by eruptions can bother people with breathing problems-such as asthma-and are worse the closer you get to the vent. The weather may be changed by volcanoes as well, many times thunderstorms are seen around eruptions because the ash that is shot into the clouds is amazing at bonding with water droplets, causing them to become very heavy. In Haiwai vog-volcanic fog- is becoming a problem, because the SO2 (Sulfuric Dioxide) combines with the humidity, or water droplets, in the air causing foggy air. The air quality has been very poor since the eruptions started way back in 198.
Recent volcanic eruptions include the ones from last year, like El heirro which erupted last year in the Canary islands. Mt St. Helens is also a much talked about volcano which has erupted more than any other volcano in the last four thousand years, one of it’s
many eruptions turned the day into night, causing some street lights to turn on in different cities, it also shot a plume of ash up eighty thousand feet in the air in fifteen minutes. In Colima, Mexico, and Dukono, Indionesia there is ongoing volcanic eruptions. However, most volcanic eruptions are still centered around the Pacific ring of fire.
In short, volcanoes are a fiery beast, which answers the call of the earth’s pressure, and the right conditions to raise it’s plumes of ashes to the sky in a salute to all it’s kinds. Many people fear them, others see them as a great thing to travel to. There is an entire study committed to volcanoes as well. There are many tourist locations where you can see volcanoes, as well as a multitude of online videos, and sites where you can learn more about them.