Examination of all possible impact combinations reveals an interesting
There are ``tubes" of high energy in the filtered output
moving along the axis of different
with little to no extent in offset or time.
As a curiosity, an example is shown in Figure 5.
Figure 5 Cube of filtered output panels for
all possible pairs of source impacts. Surprising ``tubes" of high energy exist
along the axis of paired source impacts (0.2 seconds in this example), with little extent in time and offset.
Stanford Exploration Project