Zac Gallen
English 105
Bold- Topics being discussed
Regular- Narration
Italics- Effects and video details
Intro:
Some of the deadliest things that have happened on earth were not caused by man
made items, but by natural disasters caused by Mother Nature. In addition to Tsunamis,
Volcanic eruptions, Hurricanes, and Tornadoes, Earthquakes can be held accountable for
a great deal of civilian deaths and landscape destruction. In this video hopefully more
knowledge will be given to the viewers about earthquakes, their dangerousness, how they
are measured, and where they most often occur.
What are earthquakes and how do they happen?
Start Earthquakes 101 at 0:29-1:08 “The trembling of the ground caused when
masses of rock suddenly shift below the earth’s surface is called an earthquake. Driven
by the heat deep within the earth’s core the plates grind against each other along lines
called faults. When the plate’s motions are blocked, stress builds up and finally the faults
give way. The released energy races through the earth in the form of seismic waves.”
(National Geographic)
What are tectonic plates?
“A tectonic plate is a massive, irregularly shaped slab of solid rock, generally
composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a
few hundred to thousands of kilometers across. Plate thickness also varies greatly,
ranging from less than 15 km for young oceanic lithosphere to about 200 km or more for
ancient continental lithosphere (for example, the interior parts of North and South
America).” (USGS)
What are faults, where are they located, and how do they move?
Start Earthquakes 101 0:47-0:55 Faults are the fractured lines all across the
earth’s crust that meet at different places and when highlighted look like a cracked
eggshell. “Most of the times these faults can be found near ridges in the earth along with
tectonic plates.” (AFP) Start How Earthquakes Work at 0:50-1:03 “When is comes to
earthquakes there are three different ways for faults to move. There is a normal fault, the
plates separate, reverse fault, the plates run into each other, and slip fault, the plates slide
against each other.” (How Stuff Works)
What are seismic waves and a seismograph?
Seismic waves are the energy that is released through the earth from separating,
slipping, and moving faults. Start Earthquakes 101 at 1:08-1:17 A seismograph is a
device scientists use to assist in determining how intense various seismic waves are. A
needle type thing with ink is connected to the earth and based on how intense the seismic
waves are the needle could zigzag very little or very much.
What the ways to measure earthquakes?
Start How Earthquakes Happen at 1:15-1:41 When is comes to earthquakes there
are two different ways they can be measured. In America, American scientists use a
device called a Richter scale with determines how much energy is released during the
earthquake. Meanwhile, in Europe scientists have been using the macro seismic scale,
which rates intensity. What is meant by intensity is how much possible damage the
earthquake could do. The macro seismic scale has twelve levels where one is barely felt
and twelve is landscape destroying
Where do earthquakes usually hit and what is the biggest one ever recorded?
Earthquakes are currently the worlds deadliest and most damaging natural
disasters. Between 2004 and 2011 nearly 700,000 people lost their lives when
quakes hit as far apart as Haiti, Japan, Pakistan, and Indonesia. Start How
Earthquakes Happen at 1:02-1:11 “Some of the most active earthquakes zones, Asia,
Turkey, Afghanistan, Northern Africa, and the Americas.” (AFP) The deadliest
earthquake to ever be recoded was during 1965 in the country of Chile where the
earthquake registered at an astonishing 9.5 on the Richter scale. Me typing “wow!”
Conclusion
Start music low in the background earthquakes are some of the most fascinating
things, but also some of the deadliest. Although earthquakes seem like very
complicated things, they are just strong vibrations felt through the earth due to the
moving of tectonic plates. Me typing “thank you for watching”, end music