Preview

To what extent can preparedness and planning mitigate the effects of a volcanic hazard

Better Essays
Open Document
Open Document
2202 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
To what extent can preparedness and planning mitigate the effects of a volcanic hazard
To what extent can preparedness and planning mitigate the effects of a volcanic hazard (40 marks)
Volcanic activity happens across the surface of the globe therefore bringing hazards to every affected area. A hazard is any source of potential damage, harm or adverse health effects. A volcanic hazard is any threat to life and infrastructure due to volcanic activity and related situations such as a landslide near the volcano. Volcanoes can be very dangerous and therefore present many hazards towards both people and land. They have the ability to kill and destroy, ruining livelihoods and destroying large land masses. The extent of the hazard can differ depending on how prepared an area is for an eruption and how much planning has gone behind minimising the impact. There are many different types of volcanic hazard and each can have different impacts on the economy, society and environment in a region. It is extremely important that disaster reduction measures, such as early warning systems and land use planning, are reinforced to try to reduce these impacts. There are three main stages to consider when managing a volcano. The first stage is planning and preparing before the eruption, during its critical period (as it is erupting) and evacuation.
Before an eruption there are number of ways to prepare and plan for a volcanic hazard. The most obvious is the prediction of volcanic eruptions, for example, seismic shock waves were used to predict an eruption 48 hours in advance, which resulted in the evacuation of the local population around Popocatepetl, Mexico, in 2000. The development of methods to predict volcanic eruptions is particularly important to provide information for the evacuation of populated regions with around half a billion people now living in the danger zones surrounding the world’s volcanoes. A prediction is a precise statement including the area that will erupt, when it will erupt and the hazards that may arise from the specific eruption. It is easy to

You May Also Find These Documents Helpful

  • Good Essays

    Let’s begin with Mount St. Helens which is located in the pacific northwest of the United States. To be more specific it is located in Washington State and is a part of the Cascade mountain range that spans from California to Canada. It is a composite volcano, which has steep sides that are formed by alternating layers of lava flow, and pyroclastic material made up of ash and other debris. These types of volcanoes have a tendency to have very explosive eruptions and pose a great many problems for people and animals nearby1. This is in contrast to the volcanoes found in Hawaii which have slow flowing lava eruptions and few if any massive explosions. Mount St. Helens is formed by a subduction zone where the Juan de Fuca Plate plunges beneath the North American Plate causing the uplifting of the Cascade Mountains. The last eruption took place on May 18, 1980 and had such a force that was compared to 500 Hiroshima atomic bombs going off at once2. Once the explosion went off, it lead to a blast that generated a 2.8km3 mud flow that moved 22 miles at a speed of 157 miles per hour. Many studies have been done that show there is a large rotating block under it which causes friction that was likely the cause of the eruption2. When Mount St. Helens exploded when a 5.1 magnitude earthquake went off one mile below the volcano causing the bulge that had been building for months after the collapse of the summit, to suddenly collapse on the north flank. The mudflow and lava that would follow would kill many animals and 57 people. They do not know when it will erupt…

    • 800 Words
    • 4 Pages
    Good Essays
  • Good Essays

    A hazard is a situation that poses a level of threat to life, health, property, or environment. There is a very big difference that helps prepare for a volcanic hazard and that is whether you are in a MEDC or a LEDC. In a MEDC monitoring volcanic zones and potential hazards is an option many LEDC’s don’t have. In Italy at Mt Etna they have Geochemical monitoring programs currently run by INGV which focus on the analysis of temporal changes, chemical changes and seismic activity.…

    • 812 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Firstly I do not agree with this view I believe it is more to do with the human decisions that make a volcanic eruption a hazard. For example we can see this in such volcanic events such as Mount Pelée which erupted in 1902. In the town of St Pierre there was early warning or an eruption from the volcano. From mid-April animals in the area started dying from poisonous gas realised from the volcano. In early may more signs where showing to an eruption in the near future this made the inhabitants of the town nervous and some moving out to a safe distance from the volcano. However there was an election due to take place on the 10th May so the current governor did not want the population spread across the island, he decided to call in the army to keep people in the town and stop them leaving. On the 8th may the pressure became too much and caused an gas explosion which lead to a pyroclastic flow moving at 200kmph heading toward the town of St Pierre killing all but 2 of the 29,000 inhabitants. This shows how human decision coursed unnecessary death. I believe that if the evacuation took place when the early warning where recognised that the loss of life would have been kept down to smaller number.…

    • 829 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Pavlof Research Paper

    • 589 Words
    • 3 Pages

    Volcanic eruptions can cause damage within hundreds of miles away. The volcano ash's causes airplane engines to fail, destroys crops, contaminates water, and damages electronics and machinery. When the ash touch's the ground, burying everything, sometimes even make's buildings to collapse. Mount St. Helen's produced more than 490 tons of ash that fell over some many miles. All volcanos are dangerous. They are all scattered all over the world and we don't know when they are going to blow. The three volcanos I picked were pretty interesting. The Pavlof is the most active and one of the most active in North America. The Cero Negro is not as big as the other to volcano's I picked. The Tungurahua is a very large and pretty cool looking volcano.…

    • 589 Words
    • 3 Pages
    Good Essays
  • Good Essays

    A hazard can be defined as a situation that poses a threat to life, health, property or the environment. The severity and type of volcanic hazards that occur are mainly dependent on the type of magma. Volcanic processes can be split into two categories – primary hazards and secondary hazards. The primary hazards that can occur are pyroclastic flows, lava flows, tephra and poisonous gases. The secondary hazards include Lahars, volcanic landslides, tsunamis flooding and volcanic storms. The overall impact of volcanoes as a natural hazard varies greatly from one time and place to another. This is because it depends on the volcanic event, the population density of the surrounding area, the wealth of the area, the weather at the time and sometimes the culture of the inhabitants of the area. Vulcanicity is normally associated with plate tectonic processes and occurs along constructive plate margins, destructive plate margins or above hotspots.…

    • 1598 Words
    • 4 Pages
    Good Essays
  • Better Essays

    A volcano is an earth hazard that occurs on faults between tectonic plates on a destructive boundary and an eruption is a natural disaster. A primary impact happens immediately after the disaster and before any response like death or collapsing or destruction of buildings. A secondary impact occurs later after the disaster, such less farm produce or a reduction in tourism. The severity of these impacts will differ considerably in a MEDC and LEDC where volcanic eruptions have taken place. These may be seen in the Mount St. Helen volcano eruption as well as in the Iceland volcanic eruption. They may also show that the impacts vary from volcano to volcano, place to place.…

    • 1025 Words
    • 5 Pages
    Better Essays
  • Powerful Essays

    1. What is a hazard- volcanic hazards include tephra, lava, pyroclastic flows, volcanic bombs and seismic hazards include earthquake, tsunami, liquefaction, landslides…

    • 1487 Words
    • 4 Pages
    Powerful Essays
  • Good Essays

    Both articles were insightful to the events of May 18th 1980, however both of them lacked survival techniques in the event of another eruption. By contrast, the articles covered a 27-year time gap. However neither one attempted to give any type of realistic scenarios for disaster relief, precautions to take, or any resources of further information. In the event of a natural disaster information needs to be readily available to any and everyone as it become…

    • 687 Words
    • 3 Pages
    Good Essays
  • Better Essays

    A volcanic hazard is anything that can cause a threat to human life, infrastructure or nature as a result of volcanic activity. There are methods to lessen the effects of volcanic hazards to a certain extent through planning and preparation.…

    • 1382 Words
    • 4 Pages
    Better Essays
  • Good Essays

    Although prevention of either an earthquake or a volcanic eruption isn’t possible, it is possible to manage them and reduce the overall impact. This should, in theory, be easier for MEDCs due having more money available to spend on management policies. However in some situations it isn’t the primary effects of the earthquake or eruption that have the greater impact. For example in the 2010 Eyjafjallajokull eruption in Iceland it wasn’t the lava or pyroclastic flow that caused problems, it was the ash cloud which was produced. The cloud caused most of northern European airspace to be closed between 15th April and the 23rd with disruptions continuing until late May. In total this cost the airline industry around US$1.7 billion. The impacts can also be viewed from a global perspective as although it was only European air travel which was restricted, it will have caused a lot of problems for travellers all around the world. On a local scale the eruption increased the rate of melting of nearby glaciers which meant that the Krossa glacial river increased by 6oC over a two hour period. Farmland was affected by the thick layer of ash which had fell and then become wet and compact making it difficult to continue farming. This shows…

    • 1182 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Volcanic hazards can be detrimental to the lives of the people who live near the active zone of the volcano in question due to their immense power coming from the centre of the earth however with effective management of the risks the number of deaths, disrupted lives and the economic damage can be reduced greatly. An example I will use of a recent volcano that erupted was Mt St Helens which is an active supervolcano located in Washington, USA - 96 miles south of the city of Seattle and 50 miles northeast of Portland. Clearly there is an active community of people living in close proximity of the volcano, at risk from ashfall and spewing lava.…

    • 764 Words
    • 2 Pages
    Good Essays
  • Good Essays

    A hazard can best be defined as a 'situation that poses a level of threat to life, health, property or the environment.' The overall impact of earthquakes as a natural hazard varies greatly from one place and timeframe to another. As do the types of hazards, which are categorised into primary and secondary. Primary hazards are created by the direct seismic energy of an earthquake; this could include liquefaction, slope failure and tsunamis. These primary hazards can in turn trigger secondary hazards such as floods, fires, disease and destabilisation of infrastructure. A number of factors play a part in determining the severity of these hazards.…

    • 922 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    A hazard is a perceived natural event which has the potential to threaten life and property. Most hazards are dormant or potential, with only a theoretical risk of harm; however, once a hazard becomes "active", it can create an emergency situation. A hazardous situation that has come to pass is called an incident. Hazard and vulnerability interact together to create risk. A cause of a hazard can be both natural and man-made. A natural hazard is caused by a natural process e.g. two plates rubbing together and causing an earthquake, a man-made is caused by human activity e.g. adding to global warming. A disaster is a hazard becoming reality in an event that causes deaths and damage to goods and property is a natural or man-made or technological hazard resulting in an event of substantial extent causing significant physical damage or destruction, loss of life, or drastic…

    • 2290 Words
    • 10 Pages
    Powerful Essays
  • Good Essays

    Volcanic activity happens across the surface of the globe and naturally hazards occur too. It can be said that it’s easier to predict an event than prevent it, however prediction does have a positive impact on the effects of a volcanic hazard.…

    • 844 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    Mount St Helens

    • 249 Words
    • 1 Page

    In my opinion, to prevent the disaster repeating itself we could educate more people on the dangers and make society aware. Also, use more technology and equipment to monitor the volcanic activity and warn town and neighbouring towns if any new information is gained or found. Another way to prevent this sort of disaster is to not make homes available too close to the volcano and relocate those at risk.…

    • 249 Words
    • 1 Page
    Satisfactory Essays