When a fault is expressed at the
surface, it is called a __________.
The name of the site where slippage
begins and earthquake waves radiate
outward is called the __________.
If the stress applied to the rock is
greater than rock strength, what
Blocks of rock will slide relative to one
another along a fault, causing an
The hanging wall moves __________
relative to the footwall in a __________
Which of the following is a
characteristic of an S wave?
"shaking" particle motion at right
angles to the direction of wave travel
Which of the following might be seen
where strike-slip movement has
What best describes the movement of
compression and expansion
Amongst all seismic waves, surface
have the slowest velocity
The names primary and secondary
refer to ___________.
Define earthquake intensity.
A qualitative measure of the amount
of ground shaking at a certain
A smaller earthquake in Virginia was
felt over a larger distance, as
compared to a larger earthquake in
California. What is a reason this
Richter magnitude (ML) is derived
from measuring __________ and
__________, and then plotting them on
a Richter diagram.
S minus P wave time; maximum S
Why is moment magnitude (MW)
preferred over Richter magnitude
Moment magnitude measures the
total energy released during an
earthquake and can adequately
measure the energy of large
Which of the following best describes
the transformation of stable soil into
loose, liquefied material that is able to
rise toward Earth's surface
Describe how sand volcanoes form.
An earthquake causes loose,
saturated sandy material to liquefy,
shoot upward through fractures of a
confining unit, and eventually erupt at
__________ in the sandy layer causes
the ground to subside after sand
Structures built on __________ will
become unstable during an
loose, saturated sediments
A tsunami is caused by __________.
anything that displaces water
A __________ is located at a plate
boundary between a subducting slab
of oceanic crust and an overlying
What happens to tsunami waves as
they move closer to shore?
Velocity decreases and height
Which of the following locations on
the Circum-Pacific Belt are likely to
generate a tsunami?
west coast of South America
__________ is a seismic zone that has
not produced a large earthquake for a
considerable length of time.
A seismic gap