Earthquakes Can be dangerous..... let us see it's causes and effects...

1. Earthquakes -
It's Causes And Effects

2. Outline
What are Earthquakes ?
Types
It's Causes.
It's Effects

3. Definition -
A sudden violent shaking of the ground,
typically causing great destruction, as a result
of movements within the earth's crust or
volcanic action.
What Are Earthquakes ???

4. Types Of Earthquakes
Earthquakes
Tectonic Volcanic
Collapse Explosion

5. Tectonic Earthquakes
A tectonic earthquake is one that
occurs when the earth's crust
breaks due to geological forces on
rocks and adjoining plates that
cause physical and chemical
changes.

6. Volcanic Earthquakes
A volcano earthquake is an
earthquake induced by the
movement (injection or
withdrawal) of magma.
The movement results in pressure
changes in the rock around where
the magma has experienced
stress.

7. Collapse Earthquakes
Collapse earthquakes are small
earthquakes occuring in regions of
underground caverns and mines.
The immediate cause of ground
shaking is the collapse of the roof
of the mine or cavern.

8. Explosion Earthquakes
An Explosion Earthquake is an
earthquake which results of
nuclear and chemical devices.
This occurs when enormous
energy nuclear energy is released

10. Natural Cause
Earthquakes are the result of slow-
moving processes that operate within
Earth.
Earth was hot when it formed, and has
been cooling ever since (near the
surface, for each km into Earth, the
temperature rises by about 30deg.
Celsius).
Earth's cooling causes the portions of
Earth to move, and that movement is
what we call an earthquake.

11. Some Of Human Desicions That Have Induced Earthquakes-
Dams & Reservoirs

12. Groundwater Extraction

13. Geothermal Power Plant

14. Injection Well

15. Skyscrapers

17. Effects Of Earthquakes
The Destructive Effects of an
Earthquake can be classified into
primary and secondary effects.

18. Primary Effects
They are the immediate damage
caused by the quake, such as
collapsing buildings,roads and
bridges, which may kill many
people. Those lucky enough to
survive can suffer badly from
shock and panic

19. Secondary Effects
They are the after- effects of earthquake
Secondary
Effects
Tsunamis
Soil
Liqefaction
Fire
Disease And
Famine
Landslides