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Chile earthquake 1960

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Coco Longdon

on 4 June 2013

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Transcript of Chile earthquake 1960

The Richter scale and the modified mercalli scale Chile, 22 May 1960 The start The three tectonic plates that converged into each other causing the largest earthquake ever in human history are: the South American plate, The Nazca plate and the Antarctic plate. An earthquake occurs when a number of tectonic plates either diverge, converge or transform with each other which creates stress in the plates which when suddenly released causes an earthquake. Tectonic plates Note All tectonic plates move around the mantle but some at different speeds, and when one moves faster than another or when one tries to move in the opposite direction it's called transform. Giving way If two plates are either converging or transforming one of the plates has to give way to the other and pass beneath the the other plate while the other plate goes on top of it. The Richter scale is a method used to measure power/energy of an earthquake. To be one number higher than the number below it, it has to release 31.6 times more energy!
The modified mercalli scale is another type of scale which measures the intensity of the earthquake, the magnitude. It is usually represented by: Mw.(moment magnitude) Chile earthquake 1960 It all started in Chile, Valdivia, Lumaco on the 22 May 1960.
The series of events are just like a treasure map and we're the explorers trying to find the treasure, but in our case trying to find the answer to the Chile 1960 earthquake. Richter scale Example Modified Mercalli scale Example MagnitudeTypical Maximum
Modified Mercalli Intensity
Under 2.0I
2.0 – 2.9I – II
3.0 – 3.9II – IV
4.0 – 4.9IV – VI
5.0 – 5.9VI – VIII
6.0 – 6.9VII – VIII
7.0 – 9.9VIII or higher
10.0 or higherX or higher Fault lines Fault lines are the places where tectonic plates meet, there can also be fault lines where there are weaknesses in the plate. Fault lines are where all the damage happens because that's where the plates meet. Fault lines The beginning It was just another day in Chile, all the people doing what they always do. Danger! On 22 May 1960 the pressure had built up so high it was fit to burst, and that's exactly what it did! Destruction The destruction of the earthquake was the largest we have ever seen, and there where around 2,230-6,000 casualties, and over 2,000,000 people were left homeless! Result The result of the three plates converging(south American, Nazca and antarctic) plates was a massive 9.5 earthquake (Richter scale), and XI (11) on the modified Mercalli scale!
Chile wasn't the only country that was affected, there was also the the countries around Chile and the countries opposite it because the earthquake triggered a tsunami which was strong enough to kill 61 people over in Hawaii and Philippines !
The epicenter of the earthquake was in Lumaco, Chile, and the depth of it was 33km. Treasure Yippy! We have finally found out the truth of the 1960 great Chile earthquake, or if we were pirates, our treasure chest, so in the end we found out that the three tectonic plates were converging and building up pressure until it finally burst and created the largest earthquake in human history! Bibliography http://en.wikipedia.org/wiki/1960_Valdivia_earthquake
http://library.thinkquest.org/03oct/00758/en/disaster/earthquake/boundary.gif Giving way demonstration Epicenter The epicenter is the center/core of the earthquake. Scientists use the epicenter to measure from. It's like an anchor: they measure that as the starting point and then measure outwards from it. Epicenter demonstration Quiz time Question: If the Christ Church earthquake was a 6.3 on the Richter scale and to be 1 number higher than the one below it it needs to release be 31.6 more energy than the number below it, how much more energy did the 1960 Chile earthquake release if it was a 9.5 on the Richter scale? Answer: It has to release 1584.893 times more energy!
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