Volcanic What you can do during a

volcano eruption
Eruption If indoor, close all windows and
doors

If outdoor, seek shelter

Avoid low lying areas

Wear long sleeved shirts and long

pants Earthquake
Use goggles to protect your eyes Definition
Use dust masks A sudden and violent shaking of
the ground, sometimes causing
Stay out of Volcano areas great destruction, as a result of
movements within the earth's
crust or volcanic action.

Cause
Deep within the Earth it is so hot that
some rocks slowly melt and become a
thick flowing substance called magma.
Since it is lighter than the solid rock
around it, magma rises and collects in
magma chambers. Eventually, some of
Definition the magma pushes through vents and
A volcanic eruption occurs fissures to the Earth's surface.
when magma is released from
a volcano. Volcanic eruptions Effect
can be quite calm and effusive, Volcanic eruptions can result in
or they can be explosive. additional threats to health, such as
Effusive eruptions produce lava floods, mudslides, power outages,
flows, while explosive eruptions drinking water contamination, and
produce ash and pyroclastic wildfires.
density currents.
 Precautions
Tsunami If caused by an earthquake, Drop, Cover,
then Hold On to protect yourself from the
earthquake first.
Get to high ground as far inland as
Precaution possible
Move away from buildings, utility Be alert to signs of a tsunami, such as a
wires, sinkholes, and fuel and gas lines. sudden rise or draining of ocean waters.
The greatest danger from falling debris
is just outside doorways and close to Listen to emergency information and
outer walls of buildings. Go to an open alerts. Always follow the instructions
area away from trees, telephone poles, from local emergency managers.
and buildings. Once in the open, get Evacuate: DO NOT wait! Leave as soon as
down low and stay there until the you see any natural signs of a tsunami or
shaking stops.
receive an official tsunami warning.
Causes If you are in a boat, go out to sea.
Natural forces Causes
Tectonics
Tsunami are waves caused by
Volcanism sudden movement of the ocean surface
Artificial induction due to earthquakes, landslides on the
Reservoir induction Definition sea floor, land slumping into the ocean,
large volcanic eruptions or meteorite
Seismology and nuclear explosions A tsunami is a series of waves in a impact in the ocean.
water body caused by the
displacement of a large volume of Effects
Effects water, generally in an ocean or a Flood waters can pose health risks
Surface phenomena large lake. such as contaminated water and food
supplies. Loss of shelter leaves people
Tsunamis vulnerable to insect exposure, heat, and
Seiches other environmental hazards. The
majority of deaths associated with
tsunamis are related to drownings, but
traumatic injuries are also a primary
concern.

Prepared by:
Edgardo A. Sampaga Jr.
10 - Tulip