1.Earthquakes 1. According to dictionary.reference.com an earthquake is a: Series of vibrations induced in the earth’s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. The earth is made up of tectonic plates these are massive slabs of rock floating on magma ‚as the plates move about‚ they spread apart‚ collide‚ or slide past each other‚ This is the main cause of volcanoes and earthquakes Earthquakes occur in many regions all over the world
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AN EARTHQUAKE IN AUSTRALIA Australia has a relatively low rate of seismicity due to its location towards the centre of the Indo-Australian Tectonic Plate. Earthquake activity is much higher around the margins of the Indo-Australian Plate‚ for example In places such as Indonesia‚ Papua New Guinea and New Zealand. Nevertheless‚ many historic earthquakes have Occurred in Australia and Geosciences Australia’s database (QUAKES) contains information on tens of thousands Of historic earthquakes in the
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others‚ but no matter the severity‚ there is usually a loss‚ and a cry for help. The first one I want to talk about is the earthquake that hit Haiti in 2010. By January 24th‚ at least 52 aftershocks (a smaller earthquake following the main shock of a large earthquake)‚ measuring 4.5 or greater had been recorded. An estimate of three million people were affected by the earthquake. Death toll estimates ranged from 100‚000 to 160‚000. 316 total had been affected overall. Estimated 250‚000 residences and
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“Japan earthquake: Tsunami hits north-east” Source: BBC 2‚ Horizon Special Professor Ian Stewart‚ Geologist Broadcast on 27th March 2011 In this programme‚ Ian Stewart examines the powerful geological forces that caused the devastating Japanese earthquake. 30% of all earthquakes across the world happen in Japan. Earthquakes are caused when the tectonic plates (giant slabs of rock) grind together causing the build up of huge forces. When the pressure gets too much‚ the edges of the plate suddenly
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Gujarat earthquake The 2001 Gujarat earthquake occurred on January 26‚ 2001‚ at 03:17 UTC‚ and coincided with the 51st celebration of India’s Republic Day. The location of the epicentre was Bhuj (23.6° N 69.8° E) Gujarat‚ India. With a moment magnitude (Mw) of between 7.6 and 8.1‚ the quake killed more than 20‚000 people and injured another 167‚000 and destroyed near a million homes throughout Gujarat and parts of eastern Pakistan.[3] The earthquake is considered an intraplate earthquake because
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CAUSES AND EFFECTS OF EARTHQUAKES‚ TSUNAMI AND CYCLONES EARTHQUAKES What are Earthquakes? ← An earthquake (also known as a quake‚ tremor or temblor) is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. The seismicity or seismic activity of an area refers to the frequency‚ type and size of earthquakes experienced over a period of time. Earthquakes are measured with a seismometer; a device which also records is known as a seismograph. The moment
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September 2nd‚ 1886 August 31‚ 1886‚ was one of the worst days in Charleston‚ that day we had a major earthquake of the likes of which I have never felt. The day started off as a nice calm day. My mom and I were reading a book and then all of a sudden I could hear this rumbling sound that seemed to come from inside earth. It started off as a gentle vibration then after a few minutes the noise and the vibrations became more violent. It was as if the earth had a terrible stomach ache. The shake
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The largest earthquake recorded in the 20th century is the 1960 Valdivia earthquake‚ also known as the Great Chilean earthquake which occurred on May 22‚ 1960 and hit approximately 100 miles off the coast of Chile‚ which is parallel to the city of Valdivia. With a rate of 9.5 on the moment magnitude scale‚ this earthquake occurred in the afternoon and lasted approximately 2 minutes (brit). After just thirty minutes of the major earthquake‚ a foreshock shook the area near the towns of Valdivia and
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The destructive effects of an earthquake can be classified into primary and secondary effects. Primary effects are the immediate damage caused by the quake‚ such as collapsing buildings‚ roads and bridges‚ which may kill many people. Those lucky enough to survive can suffer badly from shock and panic. Secondary effects are the after-effects of the earthquake‚ such as fires‚ tidal waves‚ landslides and disease. Fire - earthquakes destroy gas pipes and electric cables‚ causing fires to spread
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the ocean waves. Though this motion seems calm and harmless‚ it is‚ in reality‚ a great force of nature. The force becomes even stronger when it is mixed with one of nature’s greatest disasters: earthquakes. When these two great forces collide‚ structure and society are greatly impacted. Though an earthquake can happen at almost anywhere and anytime in the world‚ they all start out in the same way. Deep beneath the Earth’s surface‚ in the mantle‚ rocks are always in motion‚ rising and sinking in convection
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