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Natural Disasters-Killer Quake movie
CH. 3 Quiz/Exam
22
Geology
Undergraduate 3
02/19/2019

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Cards

Term
What is one of the leading research centers for earthquakes?
Definition
California institute of technology
Term
why couldn't data from local seismographs initially be used to locate the epicenter?
Definition
the machines were overwhelmed by the power of the quake
Term
when do we know for sure that earthquakes will occur?
Definition
immediately after big event/aftershock quakes
Term
what caused the dust storms in the mountains?
Definition
aftershocks
Term
what are the 2 reactions that scientists have to earthquakes?
Definition
fascination and devastation
Term
what kind of fault was responsible for the Northridge earthquake?
Definition
blind thrust faults
Term
why didn't the Northridge earthquake rupture the ground surface?
Definition
it was so deep it did not peak the surface of the epicenter, it stopped 5 mi below
Term
How far from downtown los angeles is the san Andreas fault?
Definition
60 miles
Term
what is the direct link between the san andreas fault and the faults beneath los angeles?
Definition
the san andreas bends in southern cali causing thrust faulting.
Term
what causes thrust faulting?
Definition
collision and compression of plates
Term
What is the relationship between mountains and earthquakes in Cali?
Definition
ground forced up due to the collision/compression of faults
Term
How much higher were the nearby mountains after the northridge earthquake?
Definition
1 foot
Term
What was the significance of the 1983 Coalinga Earthquake?
Definition
blind thrust faults caused major damage in cali
Term
why had the oil industry been mapping blind thrust faults beneath los angeles for decades?
Definition
petroleum was trapped within the folds caused by faults
Term
what fault is the greatest danger to the city of LA?
Definition
elysian park fault
Term
what was the significance of the 1987 whittier narrows quake?
Definition
showed that blind thrust faults are in LA as well
Term
how many active faults lie beneath the city of LA?
Definition
100
Term
What was the first earthquake in this swarm?
Definition
1971 San Fernando Valley
Term
most recent earthquake?
Definition
northridge 1994
Term
how can earthquakes trigger other ones?
Definition
stress transferring to near by faults
Term
where was stress transferred to after the north ridge quake?
Definition
Los Angeles-fault
Term
How is LA similar to a # of other major cities?
Definition
problems with the skyscrapers falling
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