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importance of earthquakes
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Earthquake occurs abruptly and causes severs damage to people, property, landscape and more. A great mega-thrust earthquake, known as the Great Tohoku Earthquake has shaken Japan at 5:46:24 UTC on March 11, 2011. It caused a severe disaster, including tsunami and nuclear radiation exposure.. This mega-quake located at the latitude 38.297 degree North and longitude of 142.372 degree East, near the east coast of Honshu, Japan (USGS, 2013). The earthquake and tsunami waves caused widespread damage to many areas of Japan. People in Japan are still recovering from the damages. The Tohoku earthquake caused by the movement of the Pacific plate slides underneath the Eurasia plate at the rate of three inches per year, associated with Japan Trench (NOVA, 2013). There is a debate whether the plate involved with the Pacific plate was the fragment of the North America plate because this …show more content…
While the early warning saved thousands of people, the Japan’s Meteorological Agency underestimated this earthquake as the subduction zone of Japan should not produce the magnitude 9.0 quake (Oskin, 2013a). The Tohoku Earthquake and its tsunami approximately killed 16 thousand people, injured 6 thousand people and around 3 thousand people were missing. Most people died from drowning. Around 300 thousand buildings, 4000 roads, 78 bridges, and many more were affected by the earthquake, tsunami, and fires from leaking oils and gas. Electricity, telecommunication, and railways were severely damaged. The debris of 25 million ton was generated and carried out to the sea by water (BBC News, 2012). The country’s authorities estimated more than 309 billion US dollars of damages. Landslides occurred in Miyagi and liquefaction in Chiba, Tokyo, Odaiba, and Urayasu (USGS, 2013). Furthermore, the tsunami destroyed protective tsunami seawalls. Approximately 217 square miles of Japan covered in water (Oskin,
New Madrid earthquake of 1811-1812 was known to be “one of the most powerful earthquake felt throughout the Eastern United State”(2,75) . “December 16, 1811 at 2 a.m”(1). , the first earthquake had struck in the Northern part of Arkansas through Missouri. “This earthquake occurred in Central Mississippi Valley”(2,2) . New Madrid fault is located in the northern part of Missouri and southern part of Illinois. On the morning of December 16, 1811, when the earthquake struck; “people were scared”(10,26) , they ran out of their houses as the trees were falling onto the ground and the ground was breaking up. After the earthquake ended, around 7 a.m., one of the largest aftershock occurred and it was known to be a destructive shock because
TOHOKU, Japan, Friday, Mar. 11 -Yesterday, a 9.0 magnitude Earthquake struck the east of Tohoku, Japan. The epicentre of the earthquake was located approximately 72 km east of Tohoku (38.3 degrees North latitude and 142.4 degrees East longitude), or 130 km east of Sendai as shown by the X in figure 3 below. The focus of the earthquake was 24.4 km under the epicentre. The earthquake therefore caused a tsunami due to the displacing of water above the Pacific Plate. The earthquake and tsunami together have caused approximately 20,000 deaths, 6152 injuries and 2500 people missing. Approximately 90% of these deaths were by drowning. Approximately 140,000 people have been displaced and over 500,000 buildings and structures have been destroyed or damaged. The early warning system of Japan stopped many bullet trains, and many residents received texted warnings of the earthquake and tsunami on their mobile phones giving them time to evacuate. Figures 1 and 2 show exactly how destructive the tsunami caused by the Tohoku Earthquake was.
Out of all the natural disasters that we talk about in class, the most deadly would have to be a Tsunami. Compared to earthquakes, Tsunamis have cause more deaths since 1945. A Tsunami is likely to strike anywhere on the west coast, including Santa Cruz in California – United States – North America – 36:58:24N 122:02:09W. A Tsunami is a giant “wave” of water that is caused by a sudden shift in the sea floor. The wave is a result of the water attempting to regain its equilibrium, which is driven by gravity. The size of the wave is determined by how much the sea floor is moved vertically, and how quickly it shifts. A greater water depth helps as well. They can travel up to five hundred miles an hour and have wave heights of one hundred feet. Earthquakes are the leading cause of Tsunamis. People who live in California are well aware of earthquakes that are frequently caused by the San Andreas Fault. However, not many are aware of the results of earthquakes that occur out in the Pacific Ocean. Tsunamis have also been referred to in the past as seismic sea waves, but Earthquakes aren’t the only cause of this phenomenon. Landslides, nuclear explosions, volcanic eruptions, and extra terrestrial impacts also have great water displacement results.
The Great Kanto Earthquake also known as the Tokyo-Yokohama Earthquake of 1923 hit the metropolitan area of Kanto on September 1st, 1923 around 11:58 pm. It was a 7.9 on the Richter magnitude scale, killing over one-hundred and forty thousand people due to its high magnitude and the time it happened. The earthquake struck around lunch time, when many Japanese people were at home cooking at their charcoal or gas fueled stoves. At the moment the earthquake hit, it knocked down buildings that caught flames from the stoves that fell over, enflaming the city. The fire was swept up and able to spread due to the gusts of wind that occurred for two days afterwards, resulting in firestorms. Charles Blauvelt experienced the ordeal of the fire describing the flames as “[covering] the whole city [as they] burned all day and night.” In addition to the firestorms and the earthquake itself, there was a shock because of all the fallen debris which triggered tsunamis to fill and flood Japanese cities. These tsunamis, that were about thirty feet tall, destroyed central Tokyo and immensely added to the death toll.
The Great Kanto Earthquake of Japan in 1923 was a complete shock to the nation. The destruction brought to Japan because of it affected 60% of Tokyo’s population. It is known to be the most destructive earthquake in Japanese history. Over 140,000 lives were affected in all. It wasn’t the earthquake itself that caused so much destruction, but the disasters that occurred after. As a result of the earthquake, multiple fires, a tornado, a typhoon, and a tsunami broke out and destroyed Tokyo, Yokohama, and all of its surrounding areas.
Additionally, this earthquake occurred on a thrust fault. This fault was a subduction zone slip which occurred primarily beneath the ocean were the Pacific plate plunges underneath the North American plate. This sudden upward movement of the sea floor along the rupturing fault generated a massive tsunami. This vertical deformation
An earthquake occurs abruptly and causes severs damage to people, property, landscape and more. A great mega-thrust earthquake, known as the Great Tohoku Earthquake has shaken Japan at 5:46:24 UTC on March 11, 2011. It caused a severe disaster, including tsunami and nuclear radiation exposure.. This mega-quake located at the latitude 38.297 degree North and longitude of 142.372 degree East, near the east coast of Honshu, Japan (USGS, 2013). An earthquake and tsunami waves caused widespread damage to many areas of Japan. People in Japan are still recovering from the damages.
The Pacific plate is moving northwest in relation to the North American plate, and it is believed that the total displacement along the fault since its formation more than 30 million years ago has been about 350 mi. Movement along the fault causes earthquakes; several thousand occur annually
Subduction-zone quakes account for nearly half of the world's destructive seismic events and 75 percent of the earth's seismic energy. They are along the so-called Ring of Fire, a narrow band about 38,600 km long, that coincides with the sides of the Pacific Ocean. The points at which crustal rupture occurs in such quakes tend to be far below the earth's surface, at depths of up to 645 km.
The tsunami in Thailand that occurred on December 26, 2004, was by far the largest tsunami catastrophe in human history. It was triggered by a magnitude 9.1-9.3 earthquake along the Indian-Australian seduction zone off the northern coast of Sumatra. The tsunami waves traveled primarily in the east to west direction and caused major damage along the coasts of southern Thailand. Unpredictably, it was a violent earthquake beneath the sea that initiated the massive waves and struck more than a dozen countries in Southern Asia. It also destroyed thousands of miles of coastline and even submerged entire islands permanently.
Besides producing floods and destroying buildings, earthquakes that take place under the ocean can sometimes cause tsunamis, or tidal waves. Tsunamis are high and long walls of water which travel at a very rapid rate. They are notorious for destroying entire populations and cities near coastlines. In 1896 Sanriku, Japan, with a population of 20,000, suffered such a fate. Several thousand stations monitor earthquakes all over the world. Each station contains an instrument, called a seismograph, used to detect arrival times and record seismic waves.
and other buildings have been totally or partially destroyed or damaged. The negative effects of the earthquake and tsunami are being founded by the continuing crisis at the Fukushima nuclear reactors and the resulting radioactive contamination and shortages of electricity. The continuing aftershocks caused extensive damage to infrastructure, homes, manufacturing plants, and other buildings. In addition, the damage in the agricultural and marine resources were tremendously huge. Japanese not only lost the income from exporting and trading, but they also lost the ability to self sustain.
The death toll climbs to over 10,000 and is still rising (Branigan 2). The disaster in Japan began without warning on Friday March 11, 2011 at 2:46pm with a 9.0 magnitude earthquake, the strongest ever recorded in the country (Fackler 3). A massive thirty-three foot high tsunami, generated by the earthquake, swept over lands in northern Japan, taking objects and debris with it. To make matters worse, the tsunami caused the cooling systems at several nuclear power plants to fail. The disaster in Japan was a tragic event, and it had a plethora of causes and effects.
11th March 2011, 2: 45 PM, local time Japan, a day, a time, a moment which saw what can be termed as the worst natural disasters for Japan – A magnitude-9 earthquake ruptured the fault line that spreads across 500 km along the northeastern coast of Japan. This earthquake was the fifth largest in the world as per some reports by eminent scientists. The earthquake was followed with a giant tsunami whose size was so overwhelming that the 18-feet tsunami walls near the Fukushima Daiichi nuclear power plant was literally “drowned” by waves which were, according to some horrified eyewitnesses, around 25-feet high. The death toll still remains unconfirmed as of this day and so do the number of missing persons. The capital city of Tokyo was witness to swaying skyscrapers which were reputedly built with “earthquake-safety” mechanisms.
With our understanding of detecting earthquakes, let’s look at Japan’s Tohoku earthquake. Firstly, it was a megathrust earthquake with a magnitude of 9 that ruptured undersea around 130 kilometers away from Sendai. It was from two plates, particularly the pacific and the continental plate that collided in an subductive way. It lead to a total damage over 300 billion dollars, death toll of around 16000 and a level 7 nuclear meltdown in the power plant alongside releasing 300 tons of radioactive