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Seismic Reflection Surveying

Reflected Rays are...
The increase of reflected travel time with offset distance
When seismic waves are reflected in the subsurface back to the surface
Waves that have been reflected several times
Underground explosions where the rays are reflected back to the surface
What are the two types of water layer reverberations?
Short-path multiples
Ghost reflections
Stacking
Long-path multiples
Split-spread
Underground explosions where the rays are reflected back to the surface are...
Coherent Noise
Water Layer Reverberations
Ghost Reflection
Random Noise
Scary
Coherent and random noise are hard to dissociate. What test would you apply to differentiate them?
Walk-away test
Common Mid-point test
Walk-away spray test
Common Point test
In a split-spread survey design...
The detectors are located on one side of the central shot point
The waves of a marine source are reflected on the sea bed continuously
The detectors are located on either side of the central shot point
The rays are reflected only once
The layers are dipping
The Dix formula is used for
Dipping reflectors
When there are several layers
Ghost reflections
Stacking
Stacking
Increases the Signal to Noise Ratio
Decreases the Signal to Noise ratio
Is when a seismogram is produced for each geophone
Lowers the amplitude
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