Toward noncontacting seismology

Details Toward noncontacting seismology Toward noncontacting seismology

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3201308v&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 1, CiteID L01308

Physics

Geophysics

2

Exploration Geophysics: Remote Sensing, Exploration Geophysics: Seismic Methods (3025, 7294), Exploration Geophysics: Instruments And Techniques, Physical Properties Of Rocks: Acoustic Properties, General Or Miscellaneous: Instruments Useful In Three Or More Fields

Scientific paper

Buried land mines and chemical waste may provide the contrast in elastic properties within the soil needed to achieve detection via near-surface seismic methods. The hazardous nature of these targets strongly indicates the use of noncontacting sources and receivers. A home-made ultrasonic parametric array allows us to insonify the soil with an intense beam of sound; this acoustic energy is converted to elastic waves in the soil. Our noncontacting seismometer is a microwave Doppler vibrometer that can detect seismic waves, even through grass. We believe that developments along these lines will ultimately lead to the ability to probe large areas of the near-surface in a safe and reliable fashion, without physically touching the ground.

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