A FATAL DISASTER
VOLCANIC ERUPTION BY JULIO CESAR LUNA CRISTANCHO 7 B
CONTENT PAGE • Introduction • What are theypes of volcanoes • What are the causes of a eruption • What are the Consequences of a eruption • What are the health effects of a eruption
INTRODUCTION
Volcanic eruptions happen when lava and gas are discharged from a volcanic vent. The most common consequences of this are population movements as large numbers of people are often forced to flee the moving lava flow. Volcanic eruptions often cause temporary food shortages and volcanic ash landslides called Lahar. Volcanologists classify eruptions into several different types. Some are named for particular volcanoes where the type of eruption is common; others concern the resulting shape of the eruptive products or the place where the eruptions occur
WHAT ARE THE TYPES OF VOLCANOES Hawaiian Present in volcanic lava volcanoes, they are named for the volcanoes of the Hawaiian Islands. Its lavas are very fluid, without explosive gaseous landslides take place; these lavas overflow only when they exceed the crater (at forming a lava lake) and slide easily down the slopes.They are most common in the world.
Strombolian The Mayon volcano in the Philippines, has one of the world's most perfect cone. It erupted in recent years, with a large expulsion of gases, a volcano that is formed by successive eruptions of materials volcanic, but misses much extension as the type of Hawaiian volcano.
Vulcan Large amounts of gas a little fluid magma, which is consolidated quickly emerge; why the explosions are very strong and acidic and very viscous lava emitted sprayed, producing much ash, thrown into the air accompanied by other fragmentary materials., forming lavas cordate. Pliniana or vesubiana A pine tree type Pliny the Younger used to describe the eruption. Eruption cloud from Redoubt Volcano, seen from the Kenai Peninsula.
Pelean Lava is extremely viscous and consolidated rapidly, reaching completely cover the crater; the enormous pressure of gases, end, lift the cap rises forming a great rocky needle or destroys the top of the slope. Krakatoana Such eruptions are due to the rising lava is very viscous, with a fairly low temperature, which is closing on cooling the opening of the crater which is accumulating gases that ultimately cause a large explosion blowing up part of crater and, often, with the formation of a volcanic python, little liquid, which solidifies rapidly
WHAT ARE THE CAUSES CAUSES OF AN ERUPTION The eruptions are caused by a buildup of pressure beneath a volcano. Molten rock is still pushing up but can not move, his strength increases with the passage of time as it continues to accumulate hot stuff trying to rise to the surface. Finally, the surface can produce yields and a volcanic eruption. Geologists have joined this process the phenomenon of the movement of tectonic plates. One of the things that helped the experts to conclude this is that most volcanoes in the world are located on the borders of the major plates. As a general rule, the longer the interval between eruptions in an active volcano, worse will the explosions.
WHAT ARE THE CONSEQUENCES OF AN ERUPTION Volcanic eruptions are known to devastate everything they come across along the way.Life is no exception. Each time a volcano ejected lava destroys everything in its path.Throughout world history, there have been countless human deaths from volcanic eruptions. ? The eruptions also leave consequences that are present in the long term, ie afterdisaster. It is shown that exists in all vulnerable areas of volcanic activity, an increasein the number of people seeking health care for respiratory problems and asthma and bronchitis problems with sight.
HEALTHS EFFECTS OF AN ERUPTION
Volcanic eruptions are known to devastate everything they come across along the way. Life is no exception. Each time a volcano ejected lava destroys everything in its path. Throughout world history, there have been countless human deaths from volcanic eruptions. ? The eruptions also leave consequences that are present in the long term, ie after disaster. It is shown that exists in all vulnerable areas of volcanic activity, an increase in the number of people seeking health care for respiratory problems and asthma and bronchitis problems with sight.