Download Earthquakes and Volcanoes Earthquake

Earthquakes
and Volcanoes
- shaking and vibration at
the surface of the earth
resulting from underground
movement along a fault
plane of from volcanic
activity
Earthquake
San Francisco Earthquake
1906
Alaska Earthquake
1964
IF THE GROUND SEEMS TO GLIDE,
STAY INSIDE!
This image shows what can happen outside
buildings during an earthquake. It shows a
debris-strewn street in California, after the
1906 San Francisco Earthquake.
Following an
earthquake,
these
railroad
tracks show
the bending
and folding
power of
plate
movement.
- an opening in the earth's
crust (or in the surface of
some other planet)
through which molten
lava and gases erupt
Volcano
Formation of a Volcano
Paracutin
Volcano,
Mexico
Mount St. Helens
Cinder Cone Volcano
Mount Vesuvius

Images of victims
in eruption of
Vesuvius in 79 AD.
Most died as a
result of
suffocation.
Mount Vesuvius
VOLCANIC
MOUNTAIN
NAMIBIA
IN AFRICA
What is the relationship
between the Earth’s plates,
volcanoes, and earthquakes?
Plates
http://www.extremescience.com/PlateTectonics
map.htm
Earthquakes
Volcanoes
http://hsv.com/scitech/earthsci/quake.htm
Let’s look at those maps
again.
Plates
Volcanoes
Earthquakes
Earthquakes and
Volcanoes are found where
plates meet.
– waves of force that travel
through the earth as a
result of plate movement
(i.e. earthquakes and
volcanoes)
Seismic Waves
Seismic Risk Map of the U.S.
- gives an early warning
that a tsunami is coming
Seismometer
Seismograph
records
energy
waves of the
earth
– an area where a large
number of earthquakes
and volcanic activity
occurs in the Pacific
Ocean
Ring of Fire
- is the point underground
where the rocks begin to
move during an earthquake
Focus
– a series of large water
waves caused by plate
tectonic movement
Tsunami
Earthquakes in the ocean cause
30’ Wall of Water
Destruction
- is the point above ground
where the earthquake begins
Epicenter
– assigns a single number
to quantify the amount of
seismic energy released by
an earthquake
Richter Scale
– is released by earthquakes
when it has been built up
enough
Stress