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Earthquake is a natural calamity which has power to destroy human lives in few seconds. It is lonely responsible for the huge damage to living and non-living beings. Earlier, people were unaware of the reasons of earthquake occurrence and the extent of damage. They believed that earthquake occur whenever mother earth become angry with them. It was Aristotle (a great Greek philosopher) who made people aware that earthquake occur because of some physical factors. He told that, some parts of land moves whenever air compressed within the arch escapes which is called as volcanic activity. Earthquake waves cause movement in the surrounding areas because of air pressure and imbalance.
Another reason of earthquake occurrence is isosta adjustment. Earth surface contains some raised and depressed blocks which make balance of earth surface however the balance disturb when blocks moves revolving on units of axis. Raised blocks get down and cause imbalance on the earth surface which inturn cause earthquake. Generally, it occurs in the volcano prime areas, under the feet of mountains and hills. However, it is not sure that earthquakes do not occur in other places. Earthquake may occur anytime in any part of the world. Some of the earthquakes become weak however some of them become very strong with huge force which may shake the earth suface far away from the centre point.
Earthquakes with huge intensity become really dangerous and cause severe damage. According to the scientific study with the help of Seismograph, there are some secondary waves and tertiary waves in the earthquake. There are various measurement scales which can accurately measure the intensity of earthquake such as Mercall’s scale, Richter scale, moment magnitude scale, etc. Himalaya zone, the Ganga, Deccan Plateau, the Brahmaputra valleys, etc are the earthquake prone areas in India. Kutch (Gujarat, India) earthquake of the year 1819 was so massive (calculated 8 on Richeter Scale) and affected a huge area (around 5000 square kilometers depressed by 15 feet and 1500 square kilometers raised by 50 feet). More than 10000 people were killed in the earthquake event of Latur and Osmanabad districts of Maharashtra on 30th of September in 1993.
Earthquake is the result of release of elas energy after forceful tectonic plate movements. Elas energy released in the form of seismic or shock waves which travels for a long distance outwards in all directions from the centre point (a place of maximum destruction). High-rise buildings and ancient structures of the cities ( Delhi) can be badly affected by the seismic force of earthquake.
Thật sự là hơi dài để trình bày trong một phân thi nói 2 phút cộng phần trả lời câu hỏi á?
There are many types of natural disasters, storms are one of them, a storm is a turbulent state in the atmosphere and a type of extreme weather.There are many types of storms: Snowstorms: a very heavy snow phenomenon. thick with strong winds. Usually occurs in cold or temperate countries. Sand tornado: also known as sand demon, is a phenomenon of sand swept up very high, occurring at noon in desert areas. To: is the phenomenon of wind speeding up suddenly, accompanied by strong thunderstorms. Thunderstorms: are storms accompanied by thunder, heavy rain or hail. Tornado: is a phenomenon of a circular swirling air stream extending from a thunderstorm cloud down to the ground, especially in that a thunderstorm can descend on empty fields (rural areas) and cities. Fire storm: is a way to call intense fires that have created their own convection system and wind, making it extremely large and difficult to control or extinguish. Tropical cyclones are rapidly rotating storm systems characterized by a center of low pressure, strong winds and a spiral cloud structure that produces heavy rain. lots of homes. The bigger the storm, the more loss of life and property. Storms often break trees and damage homes. A hurricane with a tornado can sweep people and houses away, break trees, cause crop damage, and cause accidents to planes and boats. Therefore, we must take timely measures to prevent storms, we must resist our house carefully, so we can prevent a little harm from storm.
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Five days of heavy rain caused a serious flood in a village in Phu Yen. The flood happened last week. Many houses were flooded, two villagers died, and five others were missing. Rescue workers looked for the missing people, and volunteers gave food and drinks to the victims.
Flood is one of the most terrible kinds of natural disaster which hurts or even kills people and animals. Floods can also damage houses, factories, public places, etc. Floods can be caused by a variety of factors, such as heavy rainfall, storm surges, or the overflow of rivers and lakes. When floods occur, they can inundate homes, businesses, and farmland, leading to significant economic losses and disruption of daily life. The impact of floods in Vietnam has been significant, with millions of people affected and billions of dollars in damage caused. There are some efforts to minimize floods. First, we must not cut down the trees in the forest illegally, because it can cause many disasters for human beings, one of which is flood. Second, We should plant any kind of trees in our house, in a barren area or on the side of the road, so the water can be absorbed easily by the root of the plants. To mitigate the impact of floods, it is important to invest in disaster preparedness and response measures. This can include early warning systems, flood-resistant infrastructure, and emergency response plans. Floods are natural disasters that can have significant social, economic, and environmental consequences. By taking proactive steps to mitigate their impact, we can help to protect communities and ensure a more resilient future.