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Earthquakes

Locating Epicenter &

Natural Disasters

Mr. Choi

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Seismic Waves

Faults

Describe what a fault is:

Describe what a fault is: a break or crack in earth’s crust where movement has occurred

What happens when rocks at a fault move?

???

An earthquake occurs!

???

What type of fault is this?

Strike-slip

What type of fault is this?

Normal Fault

What type of fault is this?

Reverse fault

Earthquakes are

in the ground that travel outward from the focus

Earthquakes are vibrations

in the ground that travel outward from the focus

Earthquakes are caused by movement of

Earthquakes are caused by movement of tectonic plates

Where do the most earthquakes occur?

Most earthquakes occur at the boundaries of plate

tectonics (plate boundaries)

What is the difference between an epicenter and

focus?

Focus=where EQ starts underground

Epicenter=location on surface above focus

How are earthquakes, faults, and energy related?

When rocks at faults move, they can build up

energy. When the energy is released, an

EQ occurs.

What are the 3 types of seismic

waves?

S-waves, P-waves, and surface waves

Which seismic wave(s) travel through the

ground?

P-wave and S-waves both travel through

the ground.

How are surface waves different

from P or S-waves?

Surface wave travels on the surface, not on

the ground

Which type of wave is this picture

showing?

P-wave

Which type of wave is this picture

showing?

S-wave

What is one factor that can effect the damage caused by

an EQ?

-how far from epicenter-how strong EQ is-what house is made out of-what ground is like -how tall house is

Explain what the magnitude of an

EQ is:

Magnitude is a measurement of how strong the EQ shakes

Which EQ has the closest epicenter to us?

6 min4 min2 min3 min

Earthquake 3

Which earthquake occurred?

32 seconds

30 seconds

11 seconds

31 seconds

Earthquake A

32 seconds

30 seconds

11 seconds

31 seconds

Which earthquake occurred?

46 seconds

11 seconds

24 seconds

10 seconds

Earthquake D

46 seconds

11 seconds

24 seconds

10 seconds

What does Mr. Choi’s brother do

for a living?

LAX Police (LAXPD)

What are the 3 types

of faults?

Normal, reverse, strike-slip

Which natural disaster lifts

buildings and cars up with strong

winds?

Tornadoes

What type of fault would be formed here?

Reverse

Who is Mr. Choi’s best friend at this

school?

Nobody

^_^

Make your wager

Final Answer

Final Question