A seismic survey is set-up with a source in a borehole, 100m below the surface, and an array of geophones on the surface. There is an interface at 200m. The top layer has velocity 1000m/s and the lower layer has velocity 2000m/s. Which of the following characteristics on a T-X plot will remain the same if the source was now moved to the surface? a. Slope of the refracted arrivals b. Intercept times of the refracted arrivals c. Arrival times of the direct ray d. Arrival times of the reflections
A seismic survey is set-up with a source in a borehole, 100m below the surface, and an array of geophones on the surface. There is an interface at 200m. The top layer has velocity 1000m/s and the lower layer has velocity 2000m/s. Which of the following characteristics on a T-X plot will remain the same if the source was now moved to the surface? a. Slope of the refracted arrivals b. Intercept times of the refracted arrivals c. Arrival times of the direct ray d. Arrival times of the reflections
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A seismic survey is set-up with a source in a borehole, 100m below the surface,
and an array of geophones on the surface. There is an interface at 200m. The top
layer has velocity 1000m/s and the lower layer has velocity 2000m/s. Which of
the following characteristics on a T-X plot will remain the same if the source was
now moved to the surface?
a. Slope of the refracted arrivals
b. Intercept times of the refracted arrivals
c. Arrival times of the direct ray
d. Arrival times of the reflections
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