Theory and feasibility tests for a seismic scanning tunnelling macroscope
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Geophys. J. Int.-2012-Schuster-1593-606.pdf
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ArticleKAUST Department
Center for Subsurface Imaging and Fluid ModelingEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2012-07-23Online Publication Date
2012-07-23Print Publication Date
2012-09Permanent link to this record
http://hdl.handle.net/10754/554369
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We propose a seismic scanning tunnelling macroscope (SSTM) that can detect subwavelength scatterers in the near-field of either the source or the receivers. Analytic formulas for the time reverse mirror (TRM) profile associated with a single scatterer model show that the spatial resolution limit to be, unlike the Abbe limit of λ/2, independent of wavelength and linearly proportional to the source-scatterer separation as long as the scatterer is in the near-field region. This means that, as the scatterer approaches the source, imaging of the scatterer with super-resolution can be achieved. Acoustic and elastic simulations support this concept, and a seismic experiment in an Arizona tunnel shows a TRM profile with super-resolution adjacent to the fault location. The SSTM is analogous to the optical scanning tunnelling microscopes having subwavelength resolution. Scaled to seismic frequencies, it is theoretically possible to extract 100 Hz information from 20 Hz data by the imaging of near-field seismic energy.Citation
Theory and feasibility tests for a seismic scanning tunnelling macroscope 2012, 190 (3):1593 Geophysical Journal InternationalPublisher
Oxford University Press (OUP)ae974a485f413a2113503eed53cd6c53
10.1111/j.1365-246X.2012.05564.x