Alaska earthquake http://www.iris.edu/hq/files/programs/education_and_outreach/aotm/31/Alaska1964EarthquakeCauses.mp4 A lot of excellent information is packed into this short video. 1. How many minutes did the shaking last? The shaking lasted 4.5 minutes. 2. What was the magnitude of the earthquake? The magnitude of the earthquake was 9.2. 3. This earthquake occurred just as geologists were figuring out plate tectonics. What principle of plate tectonics did the earthquake confirm
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San Francisco have all experienced a fault shift. In the case of Houston‚ the likelihood of an earthquake is extremely low. The instances of a fault shift on that area of the North American Plate don’t occur often. Earthquakes that occur are not by normal means of plates shifting but from the process of fluid extraction (Fehling 19). Seattle on the other hand has a very high probability of an earthquake occurring. There are three different types of quakes that the city experiences crustal quakes‚
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Prediction Why didn’t scientists know about the faults that caused the two earthquakes? Prior to September 4th‚ there were no surface signs of the Greendale Fault or the fault that generated the Lyttelton aftershock and there was no evidence for seismicity on these faults (i.e. ‘foreshocks’). Seismic surveys have located some ‘hidden’ faults across parts of the Canterbury Plains‚ but these particular regions had not been surveyed for this purpose. An oil-gas seismic survey had been carried out
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Death Toll from a Earthquake!! Number of Earthquakes Worldwide for 2000 - 2012 Located by the US Geological Survey National Earthquake Information Center (M4.5+ for most of the world; doesn’t include US regional network contributions) Magnitude 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 8.0 to 9.9 1 1 0 1 2 1 2 4 0 1 1 1 2 7.0 to 7.9 14 15 13 14 14 10 9 14 12 16 23 19 12 6.0 to 6.9 146 121 127 140 141 140
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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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1)Abstract 2)Introduction 3)Causes of earthquakes 4)Basic terminology: a)Hypocentre‚ b)Epicentre c)Focal depth 5)Earthquake size a)Magnitude b)Intensity 6) Earthquake hazard a)Primary effects b)Secondary effects 7)Earthquake loads on buildings 8)How Buildings Respond to Earthquakes 9)Common Modes of Failure a)Structural
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EARTHQUAKE An earthquake (also known as a tremor‚ temblor or seismic activity) is the result of a sudden release of energy in the earth’s crust that creates SEISMIC WAVES. Earthquakes are measured with a seismometer; a device which also records is known as a seismograph. SEISMIC DEFORMATION When an earthquake fault ruptures‚ it causes two types of deformation: static; and dynamic. Static deformation is the permanent displacement of the ground due to the event. The earthquake cycle progresses
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Hurricanes and earthquakes are two of the most dangerous natural disasters. There aren’t any similarities between hurricane and earthquakes in the way they are caused but they both cause destruction and death resulting from diseases and destruction of buildings. Let’s examine what causes these calamities and how to remain safe when they occur. Hurricanes form over warm ocean waters near the equator. They are formed when moist air over the ocean rises upward causing an area of lower air pressure
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Haiti Earthquake Notes Geography A2 Waller Hazards 2012-2013 GRW Tiarè Cole Where was it? * Port-au-Prince has a population of around 2million people Western Haiti‚ Caribbean Sea * The epicentre occurred around Port-au-Prince and as a result the majority of damage: Why did it happen? * Haiti has two fault lines running through it: * Professor Paul Mann was one of the first people to write about and predict the Earthquake * Much of the improper buildings in Haiti were as
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The 2010 Haiti earthquake was a catastrophic disaster; the earthquake measured 7.0 on the Richter scale. Its epicenter was near the town of Léogâne‚ approximately 25 km west of Haiti’s capital‚ Port-au-Prince. The earthquake occurred on Tuesday‚ January 12th‚ 2010. By January 24th‚ at least 52 aftershocks had been recorded‚ most measuring 4.5 on the Richter scale. The ground shook vigorously for nearly two minutes. The quake caused major damage to Port-au-Prince‚ and other towns in the region. Several
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