Q2 Lesson 1: Volcanic Hazards Flashcards
is formed by the surface eruption of magma from within the earth’s upper mantle
VOLCANO
Also called as stratovolcanoes
are tall, steep cones or distinctive conical shape that produce explosive eruptions
Composite Volcanoes
form very large gently sloped mounds from effusive eruptions.
Erupts less violently
Shield volcanoes
is one which has recently erupted and there is a possibility that it may erupt soon.
active volcano
is one that has not erupted in a long time but there is a possibility that it can erupt in the future.
dormant volcano
are observable facts that are arising due to volcanic activity such as eruption.
Volcanic Hazards
contain a highly-dense mix of hot lava blocks, ash and volcanic gases.
They move at very high speed down volcanic slopes
Pyroclastic flows
is one which has erupted thousands of years ago and there’s no possibility of an eruption.
extinct volcano
is when lava and gas are released from a volcano—sometimes explosively
volcanic eruption
are rock fragments that are ejected from volcano’s mouth that are comparable to cannonballs. These reach its projectile up to 5
kilometers
Ballistic Projectiles
of coarse fragments that moves along
the ground, and
lower (basal) flow
that rises above the basal
flow (Quebral 2016).
turbulent cloud of ash
are showers of airborne fine- to coarse-grained volcanic particles that fallout from the plumes of a volcanic eruption; ashfall distribution/ dispersal is dependent on prevailing wind direction
Ash fall or Tephra fall
aninventedlong word said to mean a lung disease caused byinhalingvery fine ash and sand dust.
pneumonoultramicroscopicsilicovolcanoconiosis
As magma rises towards the
surface and pressure decreases, gases are released from the liquid portion of
the magma (melt) and continue to travel upward and are eventually released
into the atmosphere (Quebral 2016)
Volcanic Gasses
