1. TABLE OF CONTENT
Introduction
Types of disaster
VOLCANO
Factors
Impact
Mitigation / prevention
Conclusion
references

2. WHAT IS DISASTER MANAGEMENT?
• Disaster management is how we deal with the
human, material, economic or environmental
impacts of said disaster, it is the process of
how we “prepare for, respond to and learn
from the effects of major failures”. Though
often caused by nature, disasters can have
human origins.

3. TYPES OF DISASTER
• NATURAL DISASTER
• MAN-MADE DISASTER

4. NATURAL DISASTER
• Natural disasters can cause
great damage on the
environment, property,
wildlife and human health.
• These events may include:
Earthquakes, floods,
hurricanes, tornadoes,
tsunamis, landslides, wildfires,
volcanic eruptions, and
extreme temperatures.
MAN-MADEDISASTER
• Man-made disasters
are caused by human
activity.
• These events may include:
Chemical spills, hazardous
material spills, explosives,
chemical or biological attacks,
nuclear blasts are all instances
of man-made disasters.

5. Example of Natural Disaster:LIGHTNING
STRIKE,CYCLONE
TORNADO,VOLCANIC ERUPTION

6. FIG: NUCLEAR BLAST, CHEMICAL TREAT,
TERRISIOM , CYBER ATTACK

7. VOLCANO
• Volcano refer to the eruption of hot molten lava
from below the surface area of earth.
• A volcano is a vent in the earth’s crust through
which Lava,Steam,ashes etc are expelled.

8. FACTORS OF VOLCANO
• Although there are several factors triggering
a volcanic eruption, three predominate: the
buoyancy of the magma, the pressure from
the exsolved gases in the magma and the
injection of a new batch of magma into an
already filled magma chamber.

9. IMPACT OF VOLCANOES
• Volcanoes spew hot, dangerous gases, ash,
lava, and rock that are powerfully destructive.
People have died from volcanic blasts.
Volcanic eruptions can result in additional
threats to health, such as floods, mudslides,
power outages, drinking water
contamination, and wildfires.

10. RINGOF FIRE
• A zone along the edge of Pacific Ocean that has
many Volcanoes and Earthquakes.
• The horseshoe shaped 40,000 kilometer long
belt is characterized by higher volcanic activity.
• The Ring of Fire is a string of volcanoes that runs
around the edge of the Pacific Ocean.

11. • A string of 452 volcanoes stretches from the
southern tip of South America, up along the coast
of North America, across the Bering Strait, down
through Japan, and into New Zealand

12. HOWARE VOLCANOES FORMED?
• When tectonic plates collide and go through
the process of subduction, it sets the
foundation for volcano. The overlapping of the
techtonic plates cause the magma to break
through the crust, which is the cause of a
volcanoe’s birth.
• When temperature and pressure rises, the
rock melts and moves through the surfaceand
crust, and releases gases and magma, volcanic
eruption occurs.

14. • The narrow opening of volcano is called Vent. The
upper part of vent is cup shaped depression
called Crater.
• The rocky material ejected during volcanic
activity is deposited on surface of Earth. It is
called Lava.

15. • Pyroclastic Flow is fluidized mixture of solid to
semi-solid fragments.
• It characterized by hot expanding gases that
flows down the flank of volcanic edifice.

16. • Pyroclastic Flows are mixture of hot gas, ash
and other volcanic rocks travelling very quickly
down the slopes of volcanoes. They are one of
the most dangerous hazards posed by
volcanoes

17. VOLCANOES CAN BE IN ONE OF THREE PHASES
• ACTIVE: Active volcanoes are ones that have
erupted in the past 10,000 years, and that are likely
to erupt again. An example Mt. Saint Helens in
U.S.A.
• DOMRANT: Volcanoes are ones that have not
erupted in the past 10,000 years ,but still have the
possibility an example is Mt. Rainier in the U.S.A.
• EXTINCT: Volcanoes are ones which no eruption has
occurred within historic times and future
occurrence are highly improveable.An example is
Mt. Ashitaka in Japan

18. HOTSPRINGS AND GEYSERS
• A natural spring of mineral water at a
temperature of 21℃ ( 70°F) or above,found in
areas of volcanic activity is called HOTSPRING.
• A hot spring that intermittently sends up
fountain like jets of water and stream into the
air is khown as GEYSER.