Far-field superresolution by imaging of resonance scattering

Gerard T. Schuster, Yunsong Huang

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We show that superresolution imaging in the far-field region of the sources and receivers is theoretically and practically possible if migration of resonant multiples is employed. A resonant multiple is one that bounces back and forth between two scattering points; it can also be the multiple between two smoothly varying interfaces as long as the reflection wave paths partially overlap and reflect from the same Fresnel zone. For a source with frequency f, compared to a one-way trip, N round trips in propagating between two scatterers increase the effective frequency by 2N × f and decrease the effective wavelength by λ/(2N). Thus, multiples can, in principle, be used as high-frequency probes to estimate detailed properties of layers. Tests with both synthetic and field data validate this claim. Improved resolution by multiple imaging is not only feasible for crustal reflections, but might be applicable to mantle and core reverberations recorded by earthquake seismologists.
Original languageEnglish (US)
Pages (from-to)1943-1949
Number of pages7
JournalGeophysical Journal International
Volume199
Issue number3
DOIs
StatePublished - Oct 29 2014

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