Volcanic events
Bazman
Each natural phenomenon has a particular impact on its
environment. Lack of familiarity with these effects
can produce incompensable results. In this section,
these natural events are introduced and verified.
Tsunami
Sometimes, magma eruption occurs in deep regions of
seas. In this case, due to pressure and subsidence of
seawater, huge waves called tsunami may occur. They
can produce a lot of damage to coastal regions.
Lahar and lava
Explosion of volcanic lakes and eruption under ice in
glacial regions, and its quick melting process can
produce volcanic flood and lahar. Big volumes of this
flood can cover very vast areas. Lavas specially
basic types can make flows that they are not dangerous
due to their low speed.
Ash throw
As a result of volcanic activity, water and ash enter
the atmosphere. Fine grain and suspended ash can
prevent from sunlight reaching to the Earth, thus
environment’s temperature decreases. In these cases,
decrement of temperature and availability of water
vapor originating from magma and atmospheric waters
can produce volcanic rain. In the regions, which is
close to the volcano, doors and windows must be
closed. Face and eyes must be also covered with a
piece of dry cloth, because wet cloth can react with
environmental gases and produce sulfuric acid.
Sometimes, huge volumes of volcanic ash can make
damage to the buildings of residential areas. It is
possible to solve this problem through on time clean
up.
Incandescent clouds
A massive of ash plus water vapor and other gases
having very high temperature come down from volcanic
mountain. This process is because that these clouds
are heavier than air. Incandescent clouds burn
everything on their way downward, and no living things
remain alive. Before such an event, region must be
discharged from residents.
