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Natural Disasters Midterm #3
Natty D
68
Geology
Undergraduate 3
05/09/2011

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Cards

Term
Which of the following is an example of an intraplate earthquake
Definition
Lisbon (1755)
Term
Seven people died by a giant flood two years after a landslide.
Definition
Gros Ventre (1927)
Term
The site of three of the largest earthquakes ever recorded in North America
Definition
New Madrid (1811-1812)
Term
Which natural disaster occurred in the Santa Cruz mountains on a transform fault boundary?
Definition
Loma Prieta (1989)
Term
About 3000 people died in this natural disaster located in Northern Italy.
Definition
Viaont Dam Disaster
Term
The _______ Segment of the San Andreas fault has an earthquake recurrence interval of about 20-to-22 year site of the most ambitious earthquake prediction experiment in the world?
Definition
Parkfield.
Term
Which earthquake was centered on the San Andreas fault?
Definition
Loma Prieta
Term
This was the first earthquake to be accurately predicted over the short term.
Definition
Haicheng (1975)
Term
This earthquake was the result of slip along a previously unknown "blind" thrust fault.
Definition
Northridge (1994)
Term
About 700 people died, mostly from fires that could not be extinguished because of broken water mains. An additional 5000 people died in the weeks and months that followed due t epidemics and disease.
Definition
San Francisco (1906)
Term
Only 92 people survived (25,000 died) by running to the top of Cemetery Hill.
Definition
Yungay, Peru (1970)
Term
This earthquake occurred offshore, above a subduction zone, and most deaths (121) were from the resulting tsunami.
Definition
Alaska(1964)
Term
Normal faults are characteristic features of _______?
Definition
Divergent plate margins
Term
Reverse faults and thrust faults are characteristic features of _________?
Definition
Convergent plate margins
Term
Strike-slip faults are characteristic features of _______?
Definition
transform plate margins
Term
S-waves
Definition
are slower than P-waves
Term
Tsunami:
Definition
are often generated by movements of the ocean floor
Term
Faults can be locked in place along stable rough spots called ______.
Definition
Asperites
Term
Dilation (associated with micro-fracttures and the influx of water) can be monitored by observing changes in:
Definition
all of the above
a)ground tilt
b)electrical conductivity of the rocks
c)radon level in ground water
Term
A type of mass wasting that moves downslope as an intact block along a well-defined curved surface is called a _______
Definition
slump
Term
A deposit of loose rock at the base of an unstable cliff is called ________?
Definition
alus?
Term
The steepest angle at which material remains stable is called the _______
Definition
angle of repose
Term
Water can enhance a landslide by:
Definition
all of these
a) adding weight to the land mass
b)lubricating the slip surface
c)destroying the cohesion between grains
Term
The changes a rock body undergoes in volume and/or shape is called:
Definition
deformation
Term
(45)
What type of stress is present in the bend of this right-stepping fault
----->
--------
<-----
Definition
tension
Term
The world's deepest earthquakes are associated with:
Definition
subduction zones
Term
47
source of earthquake at point x (on the dark line) also known as
Definition
hypocenter
Term
picture
the earthquake would have to be recorded by at least ________ seismic stations to determine the site of the epicenter.
Definition
three
Term
this area experienced a 5.5 magnitude earthquake three years earlier, in 1992. The 7.5 magnitude 1995 earthquake released ______ more energy than the 1992 earthquake?
Definition
900 times
Term
The amount of ground shaking was ______ greater than the ground shaking of the 5.5 magnitude 1992 earthquake
Definition
100 times
Term
The first seismic waves to reach Richterville were the _____
Definition
P-waves
Term
The P-S interval (the time-gap separating the p-waves and the s-waves) was greater at:
Definition
Richterville (highest town in diagram)
Term
The greatest amount of ground shaking was caused by the _______
Definition
surface waves
Term
disregarding the distance from the source of teh EQ(EQ strength will not diminish over short distances) which town experienced the most violent ground shaking?
Definition
Roll town (lowest)
Term
Point Y is called _______
Definition
The epicenter (highest point on hill)
Term
The region above the fault, labeled V is called the _______(middle of the mountain )
Definition
hanging wall
Term
The area below the fault, labeled V, is called the _________
Definition
The footwall.
Term
*The type of stress that led to te EQ was
Definition
Tension ------>
----------
<--------
Term
*The EQ occurred along a ______ fault.
Definition
Normal dip-slip
Term
The New Madrid (1811-1812) and Lisbon(1755) EQs occurred above subduction zones
Definition
False
Term
The region of shallow EQs associated with transform faults is called a Benioff Zone
Definition
False
Term
The amplitude of seismic waves will increase when they pass from solid bedrock to poorly consolidated sediments
Definition
true
Term
the energy released during an earthquake results from a process called elastic rebound
Definition
true
Term
The hypocenter (focus) is the location on the earth's surface directly above the epicenter
Definition
false
Term
The greatest frequency of earthquake activity occurs in a relatively narrow belt surrounding the Atlantic Ocean
Definition
false
Term
When examining a typical seismic record, we expect to find surface waves arriving before body waves
Definition
false
Term
devastating EQs are common in areas experiencing fault creep
Definition
false
Term
Elastic deformation is permanent and non-reversible
Definition
false
Term
the zone of brittle deformation occurs at the base of the crust, below a depth of about 30km
Definition
false
Term
A dip-slip fault can show right-lateral or left-lateral displacement
Definition
false
Term
A fault having horizontal movement only, is a strike-slip fault
Definition
true
Term
Tension results in the shortening of rock bodies by folding and reverse faulting.
Definition
false
Term
Folds are the product of plastic deformation and faults are the product of brittle deformation.
Definition
true
Term
*P-waves and S-waves travel along the outer surface of the earth
Definition
false
Term
The Richter Scale measures the intensity of and EQ.
Definition
false
Term
Unusual animal behavior provides a potential method for the short-term prediction of earthquakes
Definition
true
Term
Based on the historical record, the risk of a future EQ in the continental US greater than 8.0 on the Richter Scale is restricted to the Western US
Definition
true
Term
An eon represents the greatest expanse of geologic time
Definition
true
Term
Microtektites are small glassy spheres associated with metoerite impacts
Definition
true
Term
The element iridium is relatively rare in meteorites, but abundant in the earths crust
Definition
false
Term
The antipodal hypothesis relates the Deccan flood basalt eruptions in India to the K/T mass extinction event
Definition
true
Term
After writing his Ph.D. dissertation on Meteor Crater, ___________ worked for the U.S. geological Survey and later helped to establish the Spacewatch program to identify NEOs (near earth objects) with the potential of colliding with the Earth
Definition
Eugene Shoemaker
Term
Which of the following is NOT related to a mass extinction event?
Definition
Yellowstone Caldera
Term
The Era of Recent Life(also known as the age of mammals) is called the ______________?
Definition
Cenozoic
Term
Extinction of the dinosaurs appears to be contemporaneous with:
Definition
All of the above:
a)deposition of the clay layer at the K/T boundary
b)the Chicxulub crater
c)The Deccan flood basalt province
Term
The impact site called Meteor Crater occurs in:
Definition
none of the above
Term
The great Permian extinction appears to be contemporaneous with
Definition
the Siberian flood basalts
Term
Many scientists are convinced that the impact site for the K/T extinction is located at:
Definition
The Chicxulub structure, Yucatan, Mexico
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