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Poco Poco

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by

Hannah the Great

on 11 March 2014

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Transcript of Poco Poco

Poco Poco
History of Volcanic Eruptions
About 30,000 people were killed by
pyroclastic flows, which are mixtures
of rock fragments and clouds of ash
and gases that move away from a vent,
in 1902 when Mont Pelée, a composite
volcano on the Island of Martinique in the Caribbean, erupted.

Volcanic Activity Near Mont Isle
In 1976, the Soufriere Hills (French for sulfur outlet) volcano in the Caribbean island of Montserrat had a phreatic eruption, which is an explosion of steam, water, bombs, rocks, and ash.

In 1995, the Soufriere Hills volcano had an effusive eruption, which is when lava pours out of the volcano, rather than exploding out. The volcano also had an explosive eruption and it killed 20 people.

In 1979, the Soufriere volcano had an explosive eruption in St. Vincent, resulting in 100,000 dollars in damage.
Why do volcanoes erupt in the Caribbean?
By: Hannah P. F Block
Shield Volcanoes
Shield Volcanoes are
very broad volcanoes
that are shaped like shields.

In Shield Volcanoes,
low viscous lava
flows down from the sides.

Shield Volcanoes are created
from divergent boundaries or hotspots under the Earth's
crust. For example, Mount
Kilauea in Hawaii was
formed by a hotspot.
Cinder Cone Volcanoes
Cinder Cone Volcanoes are steep,
cone shaped volcanoes.
They also have lava with high viscosity,
which result in explosive
eruptions that include ash, cinders, and
bombs.
The crater of a Cinder Cone Volcano
looks like a bowl.
Composite Volcanoes
Composite Volcanoes (or Strato Volcanoes), like Poco Poco, are HUGE volcanoes that are formed by subduction. Composite Volcanoes are the biggest of the three types of volcanoes.

Composite Volcanoes alternate eruptions. Some eruptions may produce tephra (ash, cinder, and bombs) and are explosive. They are explosive because the lava is viscous and it does not let the volcanic gasses escape. Other eruptions produce fluid lava, and are relatively quiet.

Types of Volcanoes
Balsaltic Lava
Mount St. Helens
Cerro Negro
The eruption of Mount St. Helens on May 18th, 1980 caused the entire Northern side of the volcano to collaspe. The volcano was originally 9,760 feet, but after the eruption it was only 8,525 feet.
Hot ash and pyroclastic flows melted the
snow on the Nevado del Ruiz volcano, which is also composite, in 1985 in Colombia. The melted snow caused mudflows that buried the city beneath it, killing 25,000 people.
Mount St. Helens eruption
video
The Eastern Caribbean islands where "Poco Poco" is said to be, lies on the plate boundary of the Caribbean Plate. The North American Plate is denser than the Caribbean Plate, so it subducts underneath it. The subduction formed a series of volcanoes, also known as island arcs.
The Dangers if Poco Poco Erupted
Clouds of ash which can suffocate plants, animals and people. They can also disrupt the engines of airplanes.
If the ash is combined with water, it forms a mud like substance, which is hard to remove.
Cinders
Bombs (as in volcanic bombs)
Flowing Lava
Mudflows, if there is any type of water like snow on top of Poco Poco
What Will Happen Before Poco Poco Erupts?
There will be more seismic activity, since the magma is moving
There will be ground deformation due to the magma
Gases will begin to escape from the volcano, like carbon dioxide
What to Do If Poco Erupts
1. GET OFF THE ISLAND. DUH.

2.
If you can't get off because you were too slow, or too stubborn to
listen to the warnings, make sure you have access to an emergency
kit which should contain water, canned food, medication, dust masks, flashlights, battery operated radios, fire extinguishers and a first aid kit.

3.
If you are in a lahar hazard zone, which is a volcanic mudflow and
debris zone, move to higher ground.

4.
Follow evacuation routes.

5.
Stay out of low lying areas and valleys.

6.
Listen carefully to emergency broadcasts.

7.
Do not drive since the ash can affect car engines
.
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Bibliography
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