This document defines and provides brief descriptions of major natural disasters: - Tsunami, flood, drought, storm, and earthquake are listed as major natural disasters. - A flood is defined as an overflow of water that submerges land, usually caused by river, lake, or ocean overflow. - An earthquake is defined as the shaking of the Earth's surface from a sudden release of energy, creating seismic waves that can destroy cities. - A tsunami is defined as a series of waves caused by large volumes of water displacement, often from earthquakes or volcanic eruptions.

1. NATUAL DISASTERS
MUNEERA TV

2. LIST OUT THE MAJOR DISASTERS
IN THE WORLD
 TSUNAMI
 LAND SLIDE
 FLOOD
 DROUGHT
 STORM
 EARTH QUAKE

3. It is an overflow of water that submerges land that is usually
dry. The Europian Union (EU) Floods directive defines a flood
as a covering by water of land not normally covered by water.
In the sense of "flowing water", the word may also be applied
to the inflow of the tide.
Flooding may occur as an overflow of water from water
bodies, such as a river, lake, or ocean, in which the water
overtops or breaks levees, resulting in some of that water
escaping its usual boundaries, or it may occur due to an
accumulation of rainwater on saturated ground in an areal
flood. While the size of a lake or other body of water will vary
with seasonal changes in precipitation and snow melt, these
changes in size are unlikely to be considered significant
unless they flood property.
Flood

5. An earthquake is the shaking of the surface of the
Earth, resulting from the sudden release of energy
in the earth’s lithosphere that creates seismic
waves Earthquakes can range in size from those that
are so weak that they cannot be felt to those violent
enough to toss people around and destroy whole
cities. The seismicity or seismic activity of an area
refers to the frequency, type and size of
earthquakes experienced over a period of time. The
word tremor is also used for non- earthquake
seismic rumbling
Earthquake

7. A tsunami , also known as a seismic sea wave, is a
series of waves in a water body caused by the
displacement of a large volume of water, generally in
an ocean or a large lake. Earth quack, volcanic
eruptions and other under water explosions land
slides, glacier calving, meteorite and other
disturbances above or below water all have the
potential to generate a tsunami like normal Ocean
waves, which are generated by wind, or, which are
generated by the gravitational pull of the Moon and
the Sun, a tsunami is generated by the displacement
of water.
Tsunami

9. A landslide, also known as
a landslip or mudslide,[a form of mass
wasting that includes a wide range of ground
movements, such as rockfalls, deep failure
of slopes, and shallow debris flows. Landslides
can occur underwater, called a submarine land
slide, coastal and onshore environments.
Although the action of gravity is the primary
driving force for a landslide to occur, there are
other contributing factors affecting the
original slope stability .
Landslide

11. A drought is a period of below-average precipitation in a
given region, resulting in prolonged shortages in the
water supply, whether atmospheric, surface water or
ground water. A drought can last for months or years, or
may be declared after as few as 15 days. It can have a
substantial impact on the ecosystem and agriculture of
the affected region and harm to the local economy.
Annual dry seasons in the tropics significantly increase the
chances of a drought developing and subsequent bush
fires. Periods of heat can significantly worsen drought
conditions by hastening evaporation of water vapour.
Drought

13. A storm is any disturbed state of an environment
or in an astronomical body's atmosphere especially
affecting its surface, and strongly implying severe
weather. It may be marked by significant
disruptions to normal conditions such as strong
wind, tornados, hail, thunder and lightning (a
thunderstorm), heavy precipitation , heavy freezing
rain ,strong winds (tropical cyclone, windstorm), or
wind transporting some substance through the
atmosphere as in a dust storm, blizzard, sandstorm,
etc.
Storm