GEOL 105 - EXAM 3 QUESTIONS WITH CORRECT DETAILED ANSWERS

GEOL 105 - EXAM 3 QUESTIONS
WITH CORRECT DETAILED
ANSWERS

Hypocenter - Answer- focus of earthquake inside the earth (originates here)

Epicenter - Answer- point on earth's surface directly above the hypocenter

How to Determine Epicenter - Answer- At least three seismographs
calculate arrival times of waves
calculate distance from each center and draw circles
where they intersect is the epicenter

Where do Earthquakes occur - Answer- Convergent
Divergent
Transform
Intraplate

Shallow vs Deep Earthquakes - Answer- Shallow: divergent and transform (0-70km)
Deep: convergent (70km+)

Calculate magnitude of Earthquake - Answer- increase of magnitude by 1 releases 10
fold more energy

Long-term Earthquake Prediction - Answer- Seismic Zones
Seismic Gaps
Determine Eq cycle

Tsunami causes - Answer- underwater earthquakes
underwater volcanoes
underwater landslides
glacial caving

Rock Deformation causes - Answer- Displacement (location)
Rotation (orientation)
Distortion (shape)

Define Strain - Answer- deformation as a result of stress

Elastic strain - Answer- temporary
stress taken off it returns to original shape