“The hazards presented by volcanic and seismic events have the greatest impact on the world’s poorest people.” To what extent do you agree with this view? (40 marks) Volcanic and seismic events can take place all over the world and therefore both more economically developed countries (MEDCs) and less economically developed countries (LEDCs) can be affected. In the last 30 years there have been multiple examples of where volcanic and seismic events have had an impact on both MEDCs and LEDCs. Some
Premium Volcano 2004 Indian Ocean earthquake Earthquake
killed over 50% of Iceland’s livestock population‚ leading to famine which killed approximately 25% of the population. The Laki eruption and its aftermath has been estimated to have killed over six million people globally‚ making it the deadliest volcanic eruption in historical times. The drop in temperatures‚ due to the sulphuric gases spewed into the northern hemisphere‚ caused crop failures in Europe‚ droughts in India‚ and Japan’s worst famine." Similarly‚ people have been overcome & suffocated
Premium Volcano Basalt
‘Evaluate how plate tectonics theory helps our understanding of the distribution of seismic and volcanic events’ In 1912‚ Alfred Wegener published his theory that a single super continent named Pangaea once existed about 300 million years ago. He proposed that Pangaea then later split into two continents of Laurasia in the north and Gondwanaland in the south and that today’s continents were the result of further splitting of these two land masses. Where the plates split are known as plate boundaries
Premium Plate tectonics
understanding of the distribution of seismic and volcanic events(40) The global seismic and volcanic activity is concentrated along the margins of the earth’s plates‚ which are broken pieces of the crust and are moved by convection currents that are caused by heat rising and falling inside the mantle generated by radioactive decay in the core. This movement of the plates and the Earth’s inner activity is called plate tectonics and can cause seismic and volcanic activity. However‚ earthquakes and volcanoes
Premium Plate tectonics
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. This option open
Premium Volcano Volcanology Nevado del Ruiz
Evaluate how plate tectonics theory helps our understanding of the distribution of seismic and volcanic events. Plate tectonics is a relatively new science. It’s partially explained in the sense that we still don’t know fully about how the plates came together‚ what they were before they were the seven continents we know today. We already know‚ or have a theory‚ about what our world was like a long time ago and so if we already know that the plates can pull and push against each other‚ then surely
Free Plate tectonics
How does the theory of plate tectonics help to explain the world distribution of earthquake and volcanic zones? The Earth’s crust is made up of seven major plates and several smaller plates. These plates drift on top of the mantle. When two plates meet‚ they can either be constructive‚ destructive or conservative. At a conservative plate margin‚ one plate moves past another. As the plates are not smooth‚ great amounts of tension build up and earthquakes are made when the tension is released
Premium Plate tectonics
Explain how plate tectonics can help our understanding of the distribution of either earthquakes or volcanic eruptions. Plate tectonics can help us understand the distribution of earthquakes and volcanoes very easily‚ it is recorded that main earthquake and volcanic zones are clustered along plate boundaries and more powerful ones are near destructive and conservative plate boundaries. Over time we have learnt that earthquakes that occur on a constructive plate boundary cause little hazard to
Premium Plate tectonics
The plate tectonic theory is the theory that describes large amounts of movements in the Earths lithosphere‚ whereby Continental and Oceanic crust is moved‚ destroyed and made from this. The idea of plate tectonics builds on other concepts such as continental drift‚ where continental plates over millions of years move‚ however the concept of continental drift was not accepted for some time‚ and there were many other theories to suggest that something else took place‚ as the idea of the earth moving
Premium Plate tectonics
Evaluate how Plate Tectonic Theory helps our Understanding of the Distribution of Seismic and Volcanic Events (40 marks) The Plate Tectonic Theory developed in the late 1960’s‚ when people noticed how continents either side of the Atlantic Ocean seemed to almost fit together. Francis Bacon‚ an English Philosopher was aware of this as early as 1620. Topographical and geological evidence built up and allowed Alfred Wegener to publish a theory in 1912‚ suggesting that the continents were once all joined
Premium Plate tectonics