Unit 9. Natural disaters

WELCOME
TO OUR GROUP


DISASTER


I.Tsunami


What is Tsunami ?


•

Tsunamis, also known as seismic sea waves, are a
series of enormous waves created by an
underwater disturbance such as an earthquake,
landslide, volcanic eruption, or meteorite.

•

A tsunami can move hundreds of miles per hour in
the open ocean and smash into land with waves
as high as 100 feet or more.


II.What cause Tsunami ?


••

Drawing
Plate
Overriding
slips,
of tectonic
plate
causing subsidence and
bulges
plate
under
boundary before
strain,releasing
causing tectonic
earthquake
energy into
uplift.
water
The energy released produces tsunami waves.


II.Storm


What is Storm ?


•

Storm is a heavy fall of rain, snow, or hail, or a violent

outbreak of thunder and lightning, unaccompanied by
strong winds. Also called violent storm.

•

Meteorology. a wind of 64–72 miles per hour (29–32
m/sec).

•

It include: Ice storm, Blizzard, Snow-storm, Fire-storm,
Dust devil, Wind-storm, Squall, Gale, Tropical cyclone,
Hail-storm and Tornado


II.What cause Storm ?


•

Storms are created when a center of low pressure develops with a
system of high pressure surrounding it. This combination of opposing
forces can create winds and result in the formation of storm clouds, such
as the cumulonimbus. Small localized areas of low pressure can form
from hot air rising off hot ground, resulting in smaller disturbances such
as dust devils and whirlwinds.


Storm in U.S.A

Storm in Texas


THANK YOU
FOR LISTEINING TO OUR GROUP