Audio Transcript Auto-generated
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Hi,
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my name is Valerie Aresu and my topic for
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this presentation is going to be about earthquakes.
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I chose earthquakes because there are a lot of earthquakes that happened
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here in California and that really interests me how they were formed.
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The first fact about earthquakes is that earthquakes can be caused by
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the tectonic plates.
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Sometimes the tectonic plates shift, which is what causes earthquakes to happen.
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Earthquakes can be a natural disaster, but they can also be caused by humans.
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Every time you remove materials from the earth it can cause
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and instability which will lead to collapses that will then form the earthquake.
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According to a text, earthquakes
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can actually change the length of the day.
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To support my idea, I found a source on a website called space dot com.
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It says a new analysis of the 8.9 magnitude earthquake in Japan has found
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that the intense templar has accelerated, accelerated earth's spin, shortening
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24 hour dated
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1.8 microseconds. According to a geophysicist, physics.
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Richard grows at Nasa jet propulsion laboratory and Pasadena calif.
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So an earthquake was able to change
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And shorten the day by 1.8 microsec, even though it's not a major change,
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it is something so
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a very commonly asked question is where do earthquakes occur
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and
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an earthquake can occur and like happen anywhere in the world?
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But there's a bigger possibility that
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they might happen along the rim of the pacific ocean.
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The continent with the least amount of
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earthquakes is Antarctica.
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This is because
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Antarctica is not in the
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plate boundaries, which will
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those like don't receive earthquakes.
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Mhm.
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Something else
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that can cause earthquakes or volcanic eruptions,
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which will have after a volcano erupt
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according to the website PSN dot org,
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volcanically caused long period earthquakes are produced by vibrations
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generated by the moment of magma or other fluids
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within the volcano pressure within the system increases and the surrounding
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rock fails, creating small earthquakes.
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So the pressure within the system
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increases in the surrounding rock fails
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and that
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will most likely cause small earthquakes.
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Another question I have heard a lot of people ask
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is how can earthquakes cause damage?
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There are a lot of ways earthquakes can cause damage. For example,
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some buildings and bridges
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will lead to collapse,
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which is really bad because the people in the buildings or
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on the bridges will most likely die when they collapse.
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They are also bad because they can also disrupt our gas,
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electricity and telephone services.
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Some earthquakes can even cause other disasters to happen like landslides,
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avalanches, flash floods, fires and tsunamis.
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Another question I found on the web is what happens to the earth
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when there is an earthquake.
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This is a very common question asked by tons of people and there are
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many things that can or already happen to the earth during an earthquake.
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What happens to the earth
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during
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an earthquake is that
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the energy radiates outwards from a fall in
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all directions in the form of seismic waves.
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The seismic waves shake the earth as
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they moved through it and when the waves reach the earth's surface,
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they shake the ground and anything on it.
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In conclusion, earthquakes
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are really bad
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for
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the earth because
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for many different reasons,
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like the ones I had mentioned, and, yes.