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Test 2
Earthquakes - Weather
20
Geology
Undergraduate 1
10/24/2008

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Cards

Term
Most Destructive Earthquake
Definition
1556 in Shesi, China; killed 830,000
Term
First "Predicted" Earthquake
Definition
1975 in Liaoning Province, China
Term
Elastic Strain
Definition
Most important factor in creating earthquakes
Term
Faults
Definition
Where earthquakes occur (locally)
Term
Focus
Definition
Point where strain is released (earthquake originates)
Term
Epicenter
Definition
Point on surface above focus
Term
Tectonic Plate Boundaries
Definition
Where earthquakes occur (globally)
Term
Four Modes of Generating Earthquakes
Definition
Tectonic, Volcanic, Collapse, Explosion
Term
Convergent Boundaries
Definition
Produce earthquakes with the deepest foci
Term
Nowhere
Definition
Place on Earth safe from earthquakes
Term
Seismic Waves
Definition
Energy waves released from earthquake.
Term
Body and Surface Waves
Definition
Two main types of seismic waves
Term
P- and S-waves
Definition
Two types of body waves
Term
Love and Rayleigh Waves
Definition
Two main types of surface waves
Term
P-waves
Definition
The fastest wave, goes through liquids.
Term
Love waves
Definition
The most destructive seismic wave
Term
Seismograph
Definition
Instrument used to record earthquakes
Term
Richter Scale
Definition
Records magnitude and energy released during an earthquake
Term
Mercalli Scale
Definition
Measures intensity and perception of residents and damage caused by earthquake
Term
Locating Center of Earthquake
Definition
1. Use seismometer to measure the difference in P- and S-wave arrival times. 2. Use known velocities of these waves to calculate the distance of epicenter from seismometer. 3. Use distance calculations from three stations to triangulate the exact position of the earthquake epicenter.
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