Abstract
We seek to gain a fuller understanding of seismic coda generation
in the continental crust, by identifying secondary (scattering) sources
illuminated by a distant primary source. We have developed a migration
technique to scan seismic coda recorded by a small-aperture seismic
array for phases generated locally by scattering from large heterogeneities,
or topographic undulations. We use a widely distributed suite of
seismic events to illuminate the local crustal volume from different
directions and produce an image of the local crust. Stable apparent
secondary seismic sources are observed, and interpreted as scatterers
excited by the primary events.
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