\newcommand{\pan}[1]{#1}
\boxit{
Jon asked to see something like Figure~\ref{fig:wiggle} just for
people to get more feel for the raw data.  I have
included it in Chapter~3 when introducing the raw data.  The second
figure and description is now included just after showing the single
deconvolved/correlated shot gather in Chapter 3, Figure 9.  It shows
constant offset sections extracted from the same volume from which the
single gather was taken. }
\par
Figure~\ref{fig:wiggle}
shows 12~s of data from a single receiver.  The ten traces are
contiguous 1.2~s sections from the total 12~s record.  Therefore,
both the vertical and horizontal axes are time in seconds.
\plot{wiggle}{width=\textwidth}{Ten contiguous 1.2~s sections of data from a
  single raw record from the array.}
\par
Figure~\ref{fig:conoff} shows two constant crossline offset sections
extracted from a volume of deconvolved synthesized shot 
gathers.  The crossline offset is $2400$~m between the two
OBC lines with bold receiver locations in panel \pan{a}.  Panel \pan{b}
was produced by correlating traces from West to East (bottom to top of
panel \pan{a}), while panel \pan{c} shows reciprocal correlations.  Active
seismic data are symmetric for these two sections.  Therefore,
events in the synthesized sections must be present in both panels to
be geologic reflections.  Alternatively, panels \pan{b} and \pan{c}
are mathematically equivalent to the causal and acausal parts of the
correlations performed in a single direction.  The causal and acausal
parts of the correlations for a successfully synthesized volume of
shot gathers are also symmetric.  The lack of identifiable events in
panel \pan{b}, and the concomitant lack of symmetry between the
panels, indicates that the raw data processed by correlation do not
fulfill the source distribution requirements of the theory of
interferometry, equation 1.  The strong event below $1$~s in
panel \pan{b} is the event discussed in Figure 3.9 on which
the bold white line is overlain.  These sections, and similar ones
exploring a full range of crossline offset, do not reveal geologically
feasible events. 

\plot{conoff}{width=\textwidth}{Reciprocal constant offset sections
  produced by correlating traces in the two bold OBC lines in panel
  \pan{a}.}
