es un power point hecho con un programa de mac .Va sobre los terremotos : sus caracteristicas ...

1. EARTHQUAKES
PROYECT THIRD
EVALUATION
Made by:
 Iñigo Elorz
 Luis Gonzalez
 Rafa Guijarro
 Miguel A.
 Xavi Bringué

2. EARTHQUAKES
 Index:
 Introduction
 Localizations
 Causes
 Effects
 Examples of earthquakes in history
 What to do in case of an earthquake.
 Photos

3. EARTHQUAKES
1.INTRODUCTION:
An earthquake is the result of a sudden release of
energy in the Earth's crust that creates seismic
waves. The seismic activity of an area refers to the
frequency, type and size of earthquakes experienced
over a period of time.
Earthquakes are measured using seismometers. The
moment magnitude is the most common scale on
which earthquakes larger than approximately 5 are
reported for the entire globe. Is also measured by
the Richter scale.

4. EARTHQUAKES
 2.LOCALIZATIONS :
 Tectonic earthquakes occur anywhere in the
earth where there is sufficient stored elastic
energy to drive fracture propagation along a
plane.
The point inside the Earth where the earthquake
originates is called the hypocenter. The point
on the surface which is directly vertically
above the hypocenter is called epicenter.

5. EARTHQUAKES
 2.LOCALIZATIONS :
In an earthquake are distinguished:
Hypocenter, deep inner zone where the
earthquake occurs.
Epicenter, the surface area perpendicular to the
hypocenter, which more strongly affect seismic
waves.

6. EARTHQUAKES
 3-ORIGEN:
 The origin of an earthquake is an acumulation of
energy.
 This occurs when it restores the movement of
materials inside the earth from conditions unstables
that result from volcanic abd tectinic activities
wich originates at the edge of the plates.


7. EARTHQUAKES
 3-ORIGEN:
 Although tectonic and volcanic activities are the main
causes that are generated by earthquakes, many adverse
factors can originate them:
Accumulation of sediment, by: falling rocks on the slopes of
the mountains, caves collapse.
Changing rainfall regime, which alters watersheds and
river channels and estuaries.
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8. EARTHQUAKES
 4-EFFECTS:
 The effects of an earthquake can be one or more of which are detailed
below.
Movement and ground rupture:
Movement and ground rupture are the main effects of an earthquake on
the Earth's surface due to friction of tectonic plates, causing damage to
buildings or structures.
Damage to buildings depend on:
a) intensity of the movement, b) distance between the structure and the
epicenter;
c) geological conditions.
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9. EARTHQUAKES
 4-EFFECTS:
 Landslides and mudslides
Earthquakes, storms, volcanic eruptions and fires can lead to
instability at the edges of hills and other terrain elevations,
causing displacement in the earth
Fire:
Fire can be caused by power failure damage the gas in large
cities. A case of this type of event is the 1906 earthquake in San
Francisco, Main article: Liquefaction of the soil.
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10. EARTHQUAKES
 4-EFFECTS:
 Liquefaction:
 occurs when, because of the movement, water saturated
material such as sand, temporarily loses its cohesion and
changes from solid to liquid. This phenomenon can lead to
collapse of rigid structures such as buildings and bridges.
seaquake
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11. EARTHQUAKES
 4-EFFECTS:Tsunamis
 are huge ocean waves that travel large amount of water moving
towards the coast. In the open sea the distance between the
crests of the sea waves are close to 100 km.
 The periods range from five minutes to an hour. According to
the depth of water, tsunamis can travel at speeds of 600 to 800
km / h. They can travel long distances across the ocean: from
one continent to another.

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12. EARTHQUAKES
 5-WHAT TO DO IN CASE OF AN EARTHQUAKE:
 If it is inside a building is important:
 Stay away from windows, windows, cabinets,
walls and objects that could fall and hit you.
 Do not use the elevator, since the effects of the
earthquake could cause collapse or be trapped
inside.
 Use flashlights for lighting and avoid using
candles, matches or any flame during or
immediately after the quake, which may cause
explosion or fire.
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13. EARTHQUAKES
 5-WHAT TO DO IN CASE OF AN EARTHQUAKE:
 If the shock is surprised abroad are advised
to:
 Go to an open area, away from damaged
buildings. After a major earthquake, followed by
other smaller ones, called aftershocks, which
can be strong enough to cause additional
damage.
 Try not to approach or enter damaged
buildings. The greatest danger from falling
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14. EARTHQUAKES
 5-WHAT TO DO IN CASE OF AN EARTHQUAKE:
 After the shaking:
 If required to communicate with friends or
family, using mobile phone text messages, chat,
email or internet in general.
 Excessive calls can congest the cellular and
fixed networks.
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15. EARTHQUAKES
 6-EARTHQUAKES IN HISTORY:
 Valdivia:Chile
 Prince william sound:Alaska
 Sumatra:Indonesia
 Kamchatka:Russia
 Miyagi:Japon
 Cobquecura:Chile
 Esmeraldas:Ecuador
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16. EARTHQUAKES
 7-PHOTOS:

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