Earthquakes in Japan The Japan is located in an area where several continental and oceanic plates meet and create a major fault line; this is the cause of frequent earthquakes and the presence of many volcanoes and hot springs across Japan. If earthquakes occur below or close to the ocean‚ they may trigger tidal waves known as tsunami. Historic earthquakes Here is a brief history of earthquake in Japan. Many parts of this country have experienced devastating earthquakes and tidal waves in the
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Earthquakes in GCC An Earthquake known also as tremor is resulted from a sudden release of energy ‚which takes place in the earths crust‚ which then creates seismic waves. They are vibrations triggered by movement of rocks that have been strained (deformed) beyond their elastic limit. This activity called seismicity or seismism of an area refers to type ‚ size and frequency over a time period. Earthquakes are measured using many instruments ( up to atleast 20 different types
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Chile Earthquake Script Earthquake On February 27th 2010 at 3:34 an earthquake with a magnitude of 8.8 occurred in Chile. The earthquake lasted 90 seconds and affected a total of 6 Chilean regions but the earthquake mainly occurred offshore of Maule region. The earthquake left 93% of Chile’s population with no electricity. This earthquake not only damaged Chile but it has permanently shortened the length of our days by 1.26 microseconds and moved the earth’s axis by 8 centimetres. Tsunami
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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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EARTHQUAKE ENGINEERING IN AUSTRALIA BEFORE MECKERING AND AFTER NEWCASTLE by Charles Bubb BE‚ DIC (Eng. Seis.)‚ FIEAust‚ CPEng SUMMARY Earthquake Engineering in Australia‚ as elsewhere‚ has been formulated in the aftermath of damaging earthquakes. The first Australian Code AS2121-1979 was written and published after the 1968 Meckering WA earthquake. The second AS1170.4 1993 was published after the 1989 Newcastle NSW earthquake. Good quality Building Codes are a necessary basis for sound earthquake
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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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