Transcript Geology Powerpoint - Jeremy`s e

Earthquakes
Jeremy Geller
4S
March 27,2013
What is an Earthquake?
Are you ready to learn about earthquakes? If
your answer is yes then here we go! An
earthquake is something that shakes the earth.
There are over three million a year! Most
earthquakes happen in California. A magnitude
is how strong the earthquake was. The
magnitude goes up to 10.0. The strongest
magnitude an earthquake ever was, was 9.2. I
hoped that you learned something!
How do Earthquakes form?
Do you want to hear how an
earthquake forms? Well if you
do than your in the right
place! In order for an
earthquake to happen, two
tectonic plates have to rub
against each other. If an
earthquake forms in the water
than a tsunami happens. The
focus is directly under the
earthquake where it forms.
The epicenter is directly above
the focus on the earths
surface. I hope that you
enjoyed reading about how an
earthquake forms.
Types of Earthquakes
Are you ready to hear about
the types of earthquakes?
Well if you are then here we
go! There are three types of
plate boundaries: mid ocean,
spreading ridges, subduction
zones, and transform faults.
Mid ocean ridges move apart.
Subduction zones are plates
that collide. Divergent plates
are mostly on the ocean
where it is wet. Convergent
plate boundaries are being
destroyed. Next I will tell you
how earthquakes form.
How long can an Earthquake last?
1
0
0
1s
t
E
W
N
Are you ready to hear
how long an earthquake
can last? Well if you
are, then you’re in luck.
Earthquakes can last 20
seconds to a minute.
Normally earthquakes
last less than a minute.
Sometimes it can last a
minute to a minute and
a half. The longest
earthquake was two
minutes.
Sources
w.letusfindout.com
Usgs
wikipedia