Earthquakes occur when tectonic plates squeeze or stretch and release stress energy in the form of seismic waves. Scientists are working to predict earthquakes but currently they cannot be predicted. The epicenter is the point where the earthquake originates and seismic waves radiate out strongest. The Richter scale is used to measure an earthquake's intensity on a logarithmic scale with each whole number increase representing a tenfold increase in amplitude. Safety tips recommend dropping under sturdy furniture, covering your head and holding on during shaking, and checking for hazards after shaking stops.

1. Earthquake
Guided By:- Sameer Hirurkar
Made By:- Red House

2.  Earthquakes are the
shaking, rolling or sudden
shock of the earth’s
surface.
 Earthquakes can be felt
over large areas although
they usually last less than
one minute.
 Earthquakes cannot be
predicted, although
scientists are working on
it.

3.  There are about 20 plates along the surface
of the earth that move continuously and
slowly past each other. When the plates
squeeze or stretch, huge rocks form at their
edges and the rocks shift with great force,
causing an earthquake.

4.  As the plates move they put forces on
themselves and each other. When the force
is large enough, the crust is forced to break.
When the break occurs, the stress is
released as energy, which moves through
the Earth in the form of waves, which we
feel and call an earthquake.

5.  A seismograph is an
instrument used for
recording the intensity
and duration of an
earthquake.

6. Important Terminologies:
 EPICENTER
- The point on the
earth's surface directly
above the source of
the earthquake.
 SEISMIC WAVES
- The energy created
by the quake that
travels in waves from
the epicenter, where
they are the strongest.

7.  RICHTER SCALE
- A measurement of an earthquake's intensity.
- Each one-point increase on the scale indicates
ten times the amount of shaking and 33 times the
amount of energy.
- The energy released by a large earthquake may
be equal to 10,000 times the energy of the first
atomic bomb.

8. Richter Scale
 4 - Minor Earthquake
 5 - Moderate Earthquake
 6 - Strong Earthquake
 7 - Major Earthquake
 8 - Great Earthquake

9. Earthquake Safety Tips
 BEFORE AN EARTHQUAKE:
 Choose a safe place in every room such as under a sturdy piece
of furniture like a table or a desk where nothing can fall on you.
 Practice DROP, COVER AND HOLD ON!
- Drop under something sturdy, hold on, and protect your eyes
by pressing your face against your arm.
 Prepare a disaster supplies kit for your home and car. Include a
first aid kit, canned food and a can opener, bottled water,
battery-operated radio, flashlight, protective clothing and
written instructions on how to turn off electricity, gas, and
water.

10.  DURING AN EARTHQUAKE:
 DROP, COVER AND HOLD ON!
 Stay indoors until the shaking stops.
 Stay away from windows.
 If you’re in bed, hold on and stay there, protecting your
head with a pillow.
 If you’re outdoors, find a clear spot away from buildings,
trees and power lines. Then, drop to the ground.
 If you’re in a car, slow down and drive to a safe place. Stay
in the car until the shaking stops.

11.  AFTER THE SHAKING STOPS:
 Check for injuries.
 Inspect your home for damage.
 Eliminate fire hazards, so turn off the gas if you think its
leaking.
 Expect aftershocks.
 Each time you feel one, DROP, COVER AND HOLD ON.