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Christel Carandang
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Cards (51)
What causes an earthquake?
Movement of
tectonic plates
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Where do earthquakes mostly occur?
Along the
fault line
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What can earthquakes cause?
Great damage to
properties
and
life loss
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What factors affect earthquake hazards?
Local
topography
,
subsurface geology
,
groundwater
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What is ground shaking?
Vibration of the ground during an
earthquake
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What causes ground shaking?
Faulting
during an
earthquake
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What can ground shaking trigger?
Liquefaction
and
landslides
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What is ground rupture?
Offset of the ground due to
fault rupture
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What happens during ground rupture?
Fault rupture
extends to the
Earth's
surface
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What should you avoid when building near a fault?
Avoid building across or near these
hazards
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What is liquefaction?
Soil and groundwater mix during
shaking
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What happens to the ground during liquefaction?
It becomes very soft like
quicksand
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What can liquefaction undermine?
Foundations
of buildings,
bridges
,
pipelines
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What is ground subsidence?
Sinking
or settling of the
ground surface
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What can cause ground subsidence?
Settlement of
low-density soils
or
underground voids
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What can happen during ground subsidence?
A large area of land can subside
drastically
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What generates a tsunami?
Earthquake
with magnitude greater than
7.0
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What can a tsunami cause?
Flooding extending
inland
by a
thousand
feet
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What is a landslide?
Movement of
rock
,
debris
, or earth down a slope
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What can trigger a landslide during an earthquake?
Soil slips on
steep slopes
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What are the natural signs of an impending tsunami?
Severe shaking,
unusual
sea-level
fluctuations
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What should you feel during a tsunami warning?
Severe
shaking
of the ground
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What visual sign indicates a tsunami?
Disappearance or lowering of
sea water
level
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What loud sound might you hear before a tsunami?
Loud
roaring
sound like a
train
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What can ground shaking cause in buildings?
Objects to fall and
injure
nearby people
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How does the severity of ground shaking affect structures?
Increased severity
can cause
damage
or
collapse
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What determines the intensity of ground shaking?
Bedrock type
, duration, distance from
epicenter
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What happens to structures built across a fault?
They will be seriously
damaged
or collapse
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What happens to structures adjacent to a fault?
They acquire less
damage
than those across
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What occurs when liquefaction happens?
Ground acts like
quicksand,
weakening structures
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What can happen to underground pipes during liquefaction?
Pipes may rise to the
surface
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What can ground subsidence cause?
Permanent flooding
in the area
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How can ground subsidence occur?
Due to
ground shaking
or
fault displacement
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What can a tsunami destroy?
Houses
,
uproot
trees, and kill
people
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What can cause flooding during an earthquake?
Overflowing
from
dams
or
broken
rivers
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What can landslides during earthquakes cause?
Accidents from falling
rocks
and soil
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How can earthquakes start fires?
By breaking
power
and
gas lines
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What is an
earthquake
hazard
map
?
A map showing potential earthquake effects
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How do experts create earthquake hazard maps?
By analyzing
geographical
features and
seismic
records
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What regions in Region 3 are at high risk of earthquakes?
Zambales
,
Tarlac
,
Pampanga
,
Nueva Ecija
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See all 51 cards
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