volcano Flashcards
refers to any potentially dangerous volcanic process that puts human life, livelihoods and/or infrastructure at risk of harm.
Several hazards may affect the area around the volcano, such as lava flows, pyroclastic flows, lahars and debris avalanches.
VOLCANO HAZARDS
• are (openings in the Earth’s crust) that allows the energy from the interior of Earth to escape to the surface.
• an opening in the earth’s surface through which lava, hot gases, and rock fragments erupt
Volcano
And known as (roman of fire)
Largest active volcano are mauna loa in hawaii
Mount olympus
This is an Indonesian term for the
mixture of water, pyroclastic materials, and rock fragments
( flowing down a volcano or a river valley.)
• It is powerful enough to remove or carry away trees, boulders, and logs. Buildings, houses, and other structures can be partially or completely buried by the turbulent flow of lahar.
Lahar
.
• This is( composed of bits and pieces of pulverized rock) , minerals, and volcanic glass generated from volcanic eruption.
• Volcanic ash usually spewed out from explosive eruption when dissolved gases in magma expand and go out violently into the atmosphere.
• Ash clouds are formed especially when the atmosphere is humid and dry.
• When ash clouds are formed, they can travel farther and cover a large radius.
Ash fall
This refer to the ( fast-moving fluidized mass of rock fragments and gases)
Pyroclastic flow
• This is a rock fragment that is ejected from a volcano during its explosive eruption.
• It is like a cannonball that travels fast in the air.
• can travel as far as km or even farther, depending on the magnitude of explosion
Ballistic projectile
types of Ballistic Projectile
•
block
bomb
- if the projectile of rock or fragment is solid when ejected.
•.
Block
-if it is launched in a partially molten or molten state
Bomb
•This consists of sulfur dioxide and hydrogen sulfide, w/c are poisonous and hazardous to organisms.
• These are the main constituents of the magma that is spewed out during an eruption.
•It can cause acid rain.
• also causes respiratory problems and other health risks
Volcanic gas
• This is molten rock that pours down from the slopes of the volcano.
•It is different from pyroclastic flow in that the lava flow is denser and hence moves more slowly.
•It can kill vegetation and destroy property by burning homes and destroying infrastructure, such as bridges and roads.
•Forest fires can be ignited
Lava flow
