3-D slant stacks and elliptical moveout of passive seismic data
, by Dave Nichols
If passive seismic data recorded over a stack of plane layers is 3-D slant stacked the
slant stack traces should obey the Kunetz-Claerbout relations. We use this property to
estimate a slant stacked reflection seismogram from passive data. The events in the
estimated slant stacked reflection seismogram should show elliptical moveout. We can
therefore perform elliptical moveout scans in a similar manner to NMO scans to try to
determine the velocity structure of the subsurface. Applying the simple processing
processing sequence to the SEP passive seismic dataset does not produce clear results.
A more sophisticated model of the data is needed to estimate velocities successfully
from the ambient wavefield.
STANFORD