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SECTION ONE:
"What is an Earthquake? The
basic facts of seismology"
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Forces in the Earth cause
its surface to change over time |
Earthquakes are movements in the
Earth's crust.
Ground motions result from shifts
in the Earth's crust along breaks called faults.
Shifting along a fault can be modeled
by movements along a plane.
The properties of faults can be
described using a variety of observations.
The properties of faults in an
area depend on the forces in that area
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Rescue in Pinevale
Fault-Rupture Analogies
Rupture Models
Strike and Dip
Revealing a Fault Plane with Hypocenters
Scarp Formation
Dip Slip and Crustal Dimensions
Oblique Slip
Recurrence Interval
Different Data, Different Rates?
How Tectonic Forces Affect Faults
Find That Fault Slip!
Regional Distibution of Fault Slip
Partitioning Slip
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SECTION TWO:
"The Distribution of Earthquakes:
Rates and relations in seismology"
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Earthquakes occur in clusters. |
Earthquakes are clustered
in zones where the Earth's crust has been deformed.
The locations of earthquakes are
generally associated associated with major faults.
The locations of earthquakes are
often associated with topographic features
The locations of earthquakes vary
in depth.
Earthquakes are clustered randomly
in time.
The rate of earthquakes varies
over time.
Past rates and patterns of seismicity
can be used to calculate future probabilities of earthquakes.
Seismicity rates may be related
to properties of the Earth's crust.
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Where Do Earthquakes Happen?
Where Do Large Earthquakes Occur?
Does Topography Signal Earthquake
Potential?
An "In-Depth" Look at
Earthquake Distribution
Seismicity Rates
Is Earthquake Timing Influenced?
Landers Shakes Things Up
b ­Values
Estimating Aftershock Progression
Recognizing Foreshocks
An Earthquake Deficit?
Slip Rates vs. Seismicity Rates
Earthquake Swarms
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