Types of natural disasters!!! I hope you enjoy!!!!!

1. Work done by:
Maria Inês Teixeira
Márcia Pacheco
Miguel Brito
Curso de Especialização Tecnológica de Gestão Ambiental

2. What is it a natural disaster?
 A natural disaster is a major adverse event resulting from natural processes of the Earth
 A natural disaster can cause lost of life or property damage.
 Usually leaves an economic problem in his way.
 The gravity of the damage depends on how the consequences affects the population.

3. Types of natural disasters
Earthquakes
Landslides
Volcanic Erupcions
Hydrologicaldisasters
Floods
Limnic erupcions
Tsunamis
Maelstorms
Meteriologicaldisasters
Blizzards
Ciclonic storms
Tornadoes
Hurricans
Droughts
Hailstorms
Heat waves
It is a violent, sudden
and destructive change
either in quality of
earth's water or in
distribution or
movement of water on
land below the surface
or in atmosphere.
Are caused by extreme
weather, edge
rain, drought, snow,
extreme heat or cold, ice,
or wind. Violent, sudden
and destructive change to
the environment related to,
produced by, or affecting
the earth's atmosphere,
especially the weather-
forming processes.
HealthDisasters
SpaceDisasters
Avalanches
Sinkholes
Wildfires

4. Avalanche
Called snowslide or snowslip
Is a rapid flow of snow down a sloping surface
Active preventative measures reduce the likelihood and size of avalanches by disrupting the structure of the
snowpack.
Explosives are used extensively to prevent avalanches, by triggering smaller avalanches that break down
instabilities in the snowpack, and removing over burden that can result in larger avalanches

5. Earthquakes
Is a release of energy in the earth's crust.
Creates seismic waves
The frequency, type and size of
earthquakes experienced during a
period of time
Also known as a quake, tremor or temblor
Earthquakes are measured using observations
from seismometers

6. … Are a geological phenomenon.
Include
Rockfalls Superficial debris flowsDeep failure of slopes
Landslides

7. Sinkhole
Also known as a sink, sink-
hole, shakehole, swallet, swallow hole,
or doline.
Is a depression or hole in the ground caused by some form of
collapse of the surface layer.

8. … is an opening, or rupture, in a planet's surface or crust
Volcano
Releases
Hot magma, volcanic ash
and exhaust gases
Popular classification of volcanoes
Active
Extinct
Dormant
Volcanic eruptions

9. Wildfires
Is an uncontrolled fire in an area of combustible vegetation that occurs in the countryside
or a wilderness area.
Wildfires are caused by a combination of natural factors such as topography, fuels, and
weather.
Other names such as brushfire, bushfire, forest
fire, desert fire, grass fire, hill fire, peat
fire, vegetation fire, and veldfire
Effective prevention techniques allow supervising agencies to manage air quality, maintain ecological
balances, protect resources,and to limit the effects of future uncontrolled fires.

10. Health disasters
Is something that will affect the health of people and can
became an epidemic
In 2014 there was the problem of Ebola that killed many peoples.

11. Space disasters
Is all coming from space that falls to the ground to cause very
damages.

12. Blizzards
A violent snowstorm with winds blowing at a minimum speed
of 35 miles per hour and visibility of less than one-quarter
mile for three hours
In the United States, the National Weather Service defines a blizzard as a severe snowstorm characterized
by strong winds causing blowing snow that results in low visibilities.
Thedifferencebetweena blizzardanda snowstormis thestrengthof thewind,not theamountof snow.

13. Tornadoes
A violently rotating column of air extending from a cumulonimbus
cloud to the Earth (in rare cases from a cumulus cloud), ranging in
width from a few meters to more than a kilometer and whirling at
speeds between 40 and 316 mi per hour.
cumulonimbus cloud
cumulus cloud

14. Waterspout
Multiple-vortex tornado

15. Dusty devil

16. Hurricans
Is a rapidly rotating storm system characterized by a low-
pressure center, strong winds, and a spiral arrangement
of thunderstorms that produce heavy rain.
Depending on its location and strength, a
tropical cyclone is referred to by names
such as hurricane, typhoon, tropical storm,
cyclonic storm, tropical depression, and
simply cyclone.

17. Hurricane Isabel (2003) as seen from orbit during Expedition 7 of the International
Space Station. The eye, eyewall, and surrounding rainbands, characteristics of
tropical cyclones, are clearly visible in this view from space.

18. Droughts
Is unusual dryness of soil, resulting in crop failure and shortage of water for other
uses, caused by significantly lower rainfall than average over a prolonged period.
Hot dry winds, high temperatures and consequent evaporation of misture from the
ground can contribute to conditions of drought.

19. Hailstorms
Is a large frozen raindrop produced by intense
thunderstorms, where snow and rain can coexist in the
central updraft.

20. Heat waves
Is a prolonged period of excessively hot weather, which may be
accompanied by high humidity, especially in oceanic
climate countries.

21. Floods
It is a natural event or occurrence where a piece of land (or
area) that is usually dry land, suddenly gets submerged under
water. Some floods can occur suddenly and recede quickly.
Others take days or even months to build and discharge.

22. Limnic eruptions
Is a rare type of natural disaster in which dissolved carbon dioxide (CO2)
suddenly erupts from deep lake water, suffocating wildlife, livestock and
humans. Such an eruption may also cause tsunamis in the lake as the rising
CO2 displaces water.
Lakes in which such activity occurs may be
known as limnically active lakes or exploding
lakes. Some features of limnically active lakes
include:
Scientists believe earthquakes, volcanic activity,
or explosions can trigger such an eruption.
 CO2-saturated incoming water
 A cool lake bottom indicating an absence of direct
volcanic interaction with lake waters
 An upper and lower thermal layer with differing
CO2 saturations
 Proximity to areas with volcanic activity

23. Tsunami
Tsunamis are giant waves caused by earthquakes or volcanic
eruptions under the sea.
 Theheight:Out in the depths of the ocean, tsunami waves do not dramatically increase in height.
But as the waves travel inland, they build up to higher and higher heights as the depth of the
ocean decreases.
 Thespeedof tsunamiwavesdepends on ocean depth rather than the distance from the source of
the wave. Tsunami waves may travel as fast as jet planes over deep waters, only slowing down
when reaching shallow waters.

24. Maelstorm
Is conjunction of strong and opposing tides causes an uncommonly
powerful whirlpool. It is formed when very strong tides coming
from different (opposing) directions meet.