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We use a
brute force mute to eliminate events
that are not coincident with our beloved primary reflections, e.g.,
surface waves that arrive earlier than reflections.
Figure 1.11 depicts a shot gather before (LHS CSG) and after 50-280 Hz bandpass filtering (RHS image).
CSG seismograms before (LHS) and
after (RHS) muting of data before first arrival.