The nature of volcanic hazards essay

The latest eruption took place from Pinatubo volcano in June in Philippines. Less-reliable technological systems those with frequent system failure and less-resilient social systems those with reduced capacity for recovery following disaster are considered to be most vulnerable.

Thus if a well is drilled at a place where the average surface temperature is say Occurrences of more volcanic eruptions along coastal margins and during wet season denote the fact that there is close relationship between water and volcanic eruption.

Most chlorine released from volcanoes is in the form of hydrochloric acid which is washed out in the troposphere. Changes in the course of a river due to meandering. On land these volcanoes have low angle cones. Then pent up gases may blast the top off. Instead of getting ejected as tephra to form a cone, it forms a cauldron of lava surrounded by ice and water and eventually solidifying.

Volatile constituents, mainly water, carbon dioxide, sulphur dioxide and chlorine form gas bubbles in the congealed lava, leaving spherical, elongate and irregular cavities vesicles in the solidified rocks.

Measures to cope with cyclonic hazards: Volcanic bombs include pancake-flat scoria shaped on impacting the ground and spindle bombs which are twisted at ends as they whizzle through the air.

The energy for the explosive violence comes from the expansion of the volatile constituents present in the magma, the gas content of which determines the degree of commination of the materials and the explosive violence of the eruption.

The magnitude of earthquake is measured by the instrument called Seismograph. Most of the active volcanoes are found along the mid- oceanic ridges representing divergent plate margins constructive plate margins and convergent plate margins destructive plate margins represented by eastern and western margins of the Pacific Ocean.

Geothermal reservoirs are located in the upward flowing part of a water — convective system. Nearly, people lost their lives andpeople were rendered homeless, 90, cattle perished and property worth Rs. The rapid sliding of large mass of rocks, soil and mud along the slope of hill, mountain and highlands is termed as landslides.

This is a low mud cone deposited by mud-rich water gushing out of a vent. Coarse angular fragments become cemented to form a rock called volcanic breccia.

Natural Hazards Essay Sample

This example Environmental Hazards Essay is published for educational and informational purposes only. Geothermal installations at the Geysers in northern California have a capacity of megawatts, enough to supply the power needs of the city of San Francisco.

In the pahoehoe type the surface is smooth and billowy and often molded into forms resembling huge coils of rope. In most cases volcanoes let out lava which causes property damage rather than injuries or deaths.

Other elements that are common rock-forming elements including aluminium, iron, magnesium, potassium and calcium occupy the spaces between and around the silicate building blocks. Chemically most of these products are andesite.

These eruptions are not accompanied by explosive outbursts. The Environment as Hazard. Waters from the surface which penetrate into the ground can get heated either by contact with the rocks which are still hot or by gaseous emanations from the volcanic rocks.

They are formed by the expansion of the steam and other gases beneath the hardened crust of a lava. These lava crusts obstruct the escape of violent gases during next eruption.

Environmental Hazards Essay

These are named after Vulcano of Lipari island in the Mediterranean Sea. The rock so formed is more resistant than the shattered rock forming the walls and hence these lava filled conduits are often left behind when the rest of the volcano has been eroded away.

Lapilli are hurled out cinder fragments. After the initial eruption, clouds of gas and rock would burn everything in its path with temperatures reaching to hundreds of degrees Celsius.

India is an earthquake prone country. Such volcanoes are very destructive and are disastrous natural hazards. About 5 of these tropical cyclones become strong and severe.

Such an eruption is called a Vulcan eruption. On getting heated, the water expands and moves upward in a convective system.

Famous geysers are present in Iceland and Yellowstone National Park. Mid-Atlantic belt includes the volcanoes mainly along the mid-Atlantic ridge which represents the splitting zone of plates. Get Full Essay Get access to this section to get all help you need with your essay and educational issues.

In addition to violent eruptions, large composite cones may generate a type of mudflow called Lahar Indonesian name. There are some changes that are desirable and good like the changes of season, ripening of fruits, while there are others like earthquakes, floods and wars that are considered bad and undesirable.The nature of volcanic hazards is often classified by the violence of the explosion and thus is assigned a number from the Volcanic Explosivity Index (VEI), for instance Icelandic and Hawaiian volcanoes which erupt basaltic lava - which has a low silica content and a basic chemical composition; it reaches a maximum temperature of degrees.

Change is the law of nature. It is continuous process that goes on uninterruptedly involving phenomena, big and small, material and non-material that make over physical and socio-cultural environment.

Essay on Environmental, Hazards and Disasters. Volcanic eruptions. vi. Tsunamis. vii. Drought (ii) Man-Made Hazards. Control of Nature is a book catering a series of earth’s revenge against man-made discrepancies aimed to make the contemporary society of today realize that any struggle against natural forces must be taken with great responsibility so as to prevent any form of chaos caused by such disregard.

Free Essay: Hazards are possible sources of danger. Types of hazards are those such as hurricanes, earthquakes and volcanic eruptions. A cause is what makes.

Environmental hazards Essay Sample

Essay on Natural Hazards in India | Geography. Article shared by: Volcanic eruptions (v) Cosmic collisions.

Based on the causes, nature and character, drought can be classified as: (i) Hydrological drought—when water level of the surface and ground falls.

Environmental Hazards Essay An environmental hazard is a threat posed by the natural or built environment to humans and the things that are valued in human society. An environmental hazard becomes a disaster when the threat is realized and causes significant human loss.

The nature of volcanic hazards essay
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