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Earthquakes Hazards (Impact of Earthquakes on Ecosystems and humans)

By: Daisy Perez Class: SCI-110-2 Professor: Dr. Sergei A. Polozov
by

Daisy Perez

on 25 March 2014

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Transcript of Earthquakes Hazards (Impact of Earthquakes on Ecosystems and humans)

Earthquakes Hazards (Impact of Earthquakes on Ecosystems and humans)
By: Daisy Perez
Class: SCI-110-2
Professor:
Dr. Sergei A. Polozov
How
Earthquakes
happen?

Earthquake plate boundaries
-Most earthquakes occur
at the plate boundaries.
http://news.bbc.co.uk/2/hi/4126809.stm
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
Movement of plates
-Plates move very slowly alongside each other.
-Faults are found at the edges of the plates where the crust is moving in different directions.
http://news.bbc.co.uk/2/hi/4126809.stm
http://news.bbc.co.uk/2/hi/4126809.stm
Earthquakes Origin
-Stored energy is released in the form of an earthquake.
http://news.bbc.co.uk/2/hi/4126809.stm
http://news.bbc.co.uk/2/hi/4126809.stm
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Seismic Waves
-An earthquake emits its power through waves of energy on the focus.
-Three types of Seismic wave each traveling at different speeds.
-P Wave .
-S Wave.
-Surface waves.
http://news.bbc.co.uk/2/hi/4126809.stm
http://news.bbc.co.uk/2/hi/4126809.stm
http://news.bbc.co.uk/2/hi/4126809.stm
P Wave
-An earthquake emits its power through waves of energy.
-Primary or P-waves are felt as a sudden jolt.
http://news.bbc.co.uk/2/hi/4126809.stm
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
S Wave
-Secondary or S-waves arrive a few seconds later and are felt as a more sustained side-to-side shaking.
http://news.bbc.co.uk/2/hi/4126809.stm
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
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Surface Waves
-Arrives after the main P and S waves.
-Radiate outwards from the Epicentre.
-Epicentre: The point on the surface directly above the Hypocentre.
-Rayleigh Waves.
-Love Waves.
http://news.bbc.co.uk/2/hi/4126809.stm
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
Rayleigh Waves

-Waves have a rolling motion producing both horizontal and vertical ground movement.
-Feels like rocking in boat at sea.
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
http://news.bbc.co.uk/2/hi/4126809.stm
Love Waves
-Causes the ground to twist from side to side.
-These two types of surface waves cause the most damage to buildings.
http://news.bbc.co.uk/2/hi/4126809.stm
http://news.bbc.co.uk/2/hi/4126809.stm
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
Love Waves
Causes the ground to twist from side to side.
These two types of surface waves cause the most damage to buildings.
http://news.bbc.co.uk/2/hi/4126809.stm
http://news.bbc.co.uk/2/hi/4126809.stm
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
Impact on Ecosystems
Primary Hazards
-Ground movement.
-Shaking.

http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
Ground shakes
-Shaking in soft sediments is larger and longer than when compared with the shaking experienced at a "hard rock" site.
http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/earthquake_effects.html
Secondary Hazards
-Landslides.
-Tsunamis (Pollution).
-Volcanic Activity (Fires).
-Destruction of forests.
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
Land slides
-Hill slides.
-Home destruction.
-Blocked highways.
http://www.tulane.edu/~sanelson/Natural_Disasters/eqhazard_risks.pdf
http://www.nationalatlas.gov/articles/geology/a_geohazards.html#one
http://www.nationalatlas.gov/articles/geology/a_geohazards.html#one
http://www.nationalatlas.gov/articles/geology/a_geohazards.html#one
Tsunami
-Tidal waves.
-Submarine land slides.
-Volcanic deformation.
-Changes of elevation levels.
-Sea floor disruption.
-Coastline damage.
http://www.tulane.edu/~sanelson/Natural_Disasters/eqhazard_risks.pdf
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
Before
After
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
Volcanic Activity
-Hazards; Lava, gas, and other material
spread on the surface of the earth.
-Alters landscapes.
-Atmospheric effects.
-Causes land slides.
http://www.tulane.edu/~sanelson/Natural_Disasters/eqhazard_risks.pdf
http://www.nationalatlas.gov/articles/geology/a_geohazards.html#one
Destroys forests
-Fire.
-Collapsing.
-Flooding.

http://www.nationalatlas.gov/articles/geology/a_geohazards.html#one
Fires
-Broken gas lines.
-Broken Power lines.
-Tipped over wood.
-Stoves.
http://www.geo.mtu.edu/UPSeis/hazards.html
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
Pollution
-Debris of buildings.
-Rubble from buildings.
-Air.
-Water.
http://www.nationalatlas.gov/articles/geology/a_geohazards.html#one
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
Impact on humans
and living things

Injuries and Deaths
-Bodies of people
and animals.
-Most cause of death
is falling debris from the buildings.
http://www.geo.mtu.edu/UPSeis/hazards.html
Building and Home destruction
-Flooding.
-Collapsing.
-Burning down.
http://www.uwiseismic.com/General.aspx?id=14
Water and gas mains break/
Power disrupted
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
Natural Gas Fire, Los Ángeles (1994)
Bridges and overpasses collapse
-Ground displacement.
-Routes destroyed.
-Money to build new ones.
http://autocww.colorado.edu/~toldy3/E64ContentFiles/EarthSciences/Earthquake.html
http://www.geo.mtu.edu/UPSeis/hazards.html
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
Daisy Perez
Daisy Perez
The good in earthquakes
Creation of mountains
-Plates collide.
-Rock layers are forced
upwards creating mountains.
http://news.bbc.co.uk/2/hi/4126809.stm
http://news.bbc.co.uk/2/hi/4126809.stm
Creations of rivers/
Land formations
-Cracks cause water ways.
http://www.cartoonstock.com/directory/f/fault_line.asp
Earth activity
-Tells us the earth
is active.
-Tells us it is still a
planet we can live in.
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
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Daisy Perez
http://volcanoheaven.tumblr.com/
http://urbanlegends.about.com/library/bl_tsunami_picture.htm
Bibliography
Ammon, C. (2001, Aug. 1). Earthquake Effects. Retrieved from
http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/earthquake_effects.html
Bbc news. (2009, June 01). How earthquakes happen. Retrieved from
http://news.bbc.co.uk/2/hi/4126809.stm
Bolt, B. (2000). Earthquake. Retrieved from
http://autocww.colorado.edu/~toldy3/E64ContentFiles/EarthSciences/Earthquake.html
Earthquakes. (2011). Retrieved from http://www.uwiseismic.com/General.aspx?id=14
Geological hazards. (2011, January 26). Retrieved from
http://www.nationalatlas.gov/articles/geology/a_geohazards.html
Mercalli. (2009, February 24). Tectonic processes earthqauke hazard. Retrieved from
http://www.slideshare.net/tudorgeog/341-earthquake-hazards-1063365
Nelson, S. (2010). Earthquake hazards and risks. Retrieved from
http://www.tulane.edu/~sanelson/Natural_Disasters/eqhazard_risks.pdf
Thouret, J. (1999). Urban hazards and risks; consequences of earthquakes and volcanic
eruptions: An introduction.GeoJournal, 49(2), 131-131. Retrieved from http://ezproxy.cu-portland.edu/login?url=http://search.proquest.com/docview/223685548?accountid=10248
Warner, C. (2009, September 25). Earthquakes – the good and the bad. Retrieved from
http://mtweb.mtsu.edu/cribb/1030Earthquakes.pdf
http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/earthquake_effects.html
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(Jean, 1999)
(Jean, 1990)
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Tsunamis...
http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/earthquake_effects.html
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Tsunamis...
http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/earthquake_effects.html
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