Disaster Readiness and Risk Reduction Chapter 4(Earthquake Hazards) 1. Ground or Surface Rupture 2. Liquefaction 3. Earthquake-Induced Subsidence and Lateral Spreading 4. Earthquake-Induced Landslide

2. 1. Identify various
potential earthquake
hazards
2. Recognize the natural
signs of an impending
tsunami
3. Analyse the effects of
the different earthquake
hazards

3. What is
an
Earthqu
ake?

4. known as a quake,
tremor or temblor) is
the perceptible
shaking of the
surface of the Earth,
resulting from the
sudden release of
energy in the Earth’s

6. A phenomenon in which the strength and stiffness
of a soil is reduced by earthquake shaking. It normally
occurs in saturated soils
A. Ground or Surface Rupture
B.Liquefaction
C.Earthquake-induced ground
subsidence and lateral spreading
D.Earthquake-induced Landslides

7. A wide range of ground movement, such as rock
falls, deep failure of slopes, and shallow debris fall
A. Ground or Surface Rupture
B.Liquefaction
C.Earthquake-induced ground
subsidence and lateral spreading
D.Earthquake-induced Landslides

8. Any structure built across the fault is at risk of
being torn apart as the two sides of the fault slip past
each other
A. Ground or Surface Rupture
B.Liquefaction
C.Earthquake-induced ground
subsidence and lateral spreading
D.Earthquake-induced Landslides

9. Lowering of the ground surface may be due to
downward vertical displacement on one side of a fault
A. Ground or Surface Rupture
B.Liquefaction
C.Earthquake-induced ground
subsidence and lateral spreading
D.Earthquake-induced Landslides

10. POTENTIAL
EARTHQUAKE
HAZARDS
 Ground Shaking or
Ground Motion
 Ground or Surface
Rupture
 Liquefaction
 Earthquake-induced
ground subsidence and
lateral spreading
 Tsunami
 Earthquake-induced

11. NATURAL
SIGNS OF AN
IMPENDING
TSUNAMI
1. Animal Behaviour
Some zoologists
hypothesize that some animal
species like elephants can
sense subsonic Rayleigh
waves from an earthquake or
a tsunami.
2.Drawback
Occur as the shoreline
recedes dramatically,
exposing normally submerged
areas. Drawbacks can exceed

12. ACTIVITY:
1. Given are pictures of actual
earthquake hazards that
occurred in the Philippines.
2. Organize/Classify these
pictures in a Clear Folder and
provide a footnotes for your
analysis on the effects of the

13. OUTPUT:
1. Analyse the effects of the different
earthquake hazards
 Presentation/Layout – 15 pts.
 Organization – 25 pts.
 Content – 40 pts.
 Originality – 20 pts.

14. END OF
CHAPTER 4