Earthquakes
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each of the black spaces below before clicking
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| P waves | Waves that travel the fastest and don't do any damage.
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| Fault | Place where 2 plates meet to create earthquake. Most famous one is in California.
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| Focus | Point in the earth's crust where an earthquake begins
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| Moment Magnitude Scale | more accurate than richter scale, combines seismograph readings and rock movement.
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| Modified Mercalli Scale | Records visual damage as an indication of strength, 12 grades on the scale.
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| Animal Behaviour (Predicting Earthquakes) | Not scientific. Animals can detect P waves which humans cant & they react to them.
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| Historical Records (Predicting Earthquakes) | General prediction, unreliable. Earthquake once every 100 yrs = 10% chance every decade.
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| Rock Stress (Predicting Earthquakes) | Most reliable but not exact prediction. Use strainmeters, tiltmeters, Satellite/GPS, siesmographs.
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| Foreshocks | Tremors before earthquake happens
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| San Andreas Fault | Most famous fault line in the world
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| The Big One | Large earthquake that is predicted to occur before 2032 along San Andreas Fault.
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| Rift Valleys | Where earthquakes occur when convection currents split the continent apart in places such as the East African Rift Valley.
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| Seismograph | Equipment used to measure strength of earthquake
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| Richter scale | Readings from a seismograph that measures the magnitude (strength) of an earthquake.
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| Tsunami | Destructive wave caused by an underwater earthquake. Japan 2011.
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| Elastic rebound | It is the most common cause of earthquakes, as layers of rock are exposed to pressure from opposite sides.
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| What year did the Haitian earthquake happened | The Haitian earthquake of 2010
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| How many people are killed in Haitian earthquake | 160,000 people died
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| What was the mean reason people were injured | 300,000 people estimated to have been injured-mostly from falling debris
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| Liquefaction | Intense shaking causes ground water to mix with mud turning the soil into liquid, structures collaspe.eg kobe japan 5000 deaths
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| Continental-continental | Both continental and light so neither subduct. Both plates buckle and are pushed upward. Mountain ranges are created. E.g Indo-Australian plate and Eurasian plate buckled to create The Himalayas.
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| Epicentre | Directly above the focus, shortest distance to the surface,
seismic waves strongest here,most damage caused
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| Seismic Waves | Vibrations from the focus, cause damage in urban areas,
Eg. Haiti 2010
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Created by:
5thyear201819
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