Transcript What are earthquakes?

The earthquakes
Integrants:
Renato
Renzo
Sebastian
Andres
Section
One
What are earthquakes?
• Although we still can't predict
when an earthquake will
happen, we have learned
much about earthquakes as
well as the Earth itself from
studying them. We have
learned how to pinpoint the
locations of earthquakes,
how to accurately measure
their sizes, and how to build
flexible structures that can
withstand the strong shaking
produced by earthquakes
and protect our loved ones.
Where they often occur ? Why ?
•
Most of the earthquakes occurred
at subduction zones (where an
oceanic plate is being subducted
underneath either another
oceanic plate or a continental
plate). This is not the type of
environment under which the
Lewis thrust was active. The
earthquakes in the Andes, the
Himalayas, northern Africa, and
throughout Iran occurred along
faults that are similar to the Lewis
thrust. There are also many active
thrust faults in southern
California, and the Coast and
Transverse Ranges were uplifted
along such faults. This figure
indicates that not only are thrust
faults physically possible, they are
very common.
How likely is it that your area will
experience an earthquake ?
• We have earthquakes
because Lima is on the
South American plate
and thats why we have
30% of pocibilities to
have an earthquake.
Section
Two
How earthquakes affect peoples
lives?
Of all the destructive phenomena
of nature, the earthquake is
most devastating. In just a
moment of time entire cities
have been leveled, courses of
rivers have been changed and
lives of thousands of people
have been snuffed out.
An earthquake is a shaking of the
ground caused by the breaking
and shifting of subterranean
rock, as far as 400 miles down,
under tremendous pressure.
The earth's surface is very
mobile even though it appears
solid and stable.
How volcanoes affect people
lives ?
Volcanoes affect people in many
ways, some are good, some
are not. Some of the bad
ways are that houses,
buildings, roads, and fields
can get covered with ash. As
long as you can get the ash
off (especially if it is wet),
your house may not collapse,
but often the people leave
because of the ash and are
not around to continually
clean off their roofs. If the
ashfall is really heavy it can
make it impossible to
breathe.
Lava flows are almost always
too slow to run over people,
Interview
•
Garth Rogers ed., The Fire has Jumped. Eyewitness accounts of the
eruption and evacuation of Niuafo'ou, Tonga, Suva, Fiji: IPS,USP, 1986.
is a wonderful collection of translated recountings by the people of
Niuafo'ou (and others in Niufo'ou at the time) about the day Niufo'ou
went to the sky.
• As we kept on going up, I felt that I could no longer hold onto
our bag of clothes and carry Liku'one, so I threw our bag of
clothes into the bush. As we went up, as time went on, I felt
the heat and the scorching of the fire on my back, and as a
result another fearful thought occurred to me, that I should
throw away my poor little girl and go on myself and survive. Of
course I couldn't see the fire behind me any more, but in my
mind the fire was very close to getting us, and from the
rumbling of the lava flow it seemed as if it would rush up and
get us.
Section
Three
How community residents and
authorities can prepare for an
earthquake or volcanic eruption ?
• We can prepare doing
quicly evacuations.
• Call to the scientist to
know how the
earthquake or an
volcanic eruption
occur.
• To have rescue teams.
Section
Four
Conclusion
The earthquake occur mostly in the coast of the
pacific ocean. The volcanos occur mostly in
the oceans or in the Islands. The volcanos
and the earthquakes are very dengeraus for
human people and they kept as alot of
materials basic for awer live. When lava get
on the ocean, tha lava intoxicate oll the water.
In Europe and in Asia is very dificult to occur
an earthquake. Earthquakes occur by the
tectonics plats.
THE
END