Seismic reflections from depths of less than two meters

Seismic reflections from depths of less than two meters

Three distinct seismic reflections were obtained from within the upper 2.1 m of flood‐plain alluvium in the Arkansas River valley near Great Bend, Kansas. Reflections were observed at depths of 0.63, 1.46, and 2.10 m and confirmed by finite‐difference wave‐equation modeling. The wavefield was densel...

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Veröffentlicht in:Geophysical research letters 1999-01, Vol.26 (2), p.279-282
Hauptverfasser: Baker, Gregory S., Schmeissner, Chris, Steeples, Don W., Plumb, Richard G.
Format: Artikel
Sprache:eng
Schlagworte:
Applied geophysics
Earth sciences
Earth, ocean, space
Exact sciences and technology
Freshwater
Internal geophysics
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Zusammenfassung:Three distinct seismic reflections were obtained from within the upper 2.1 m of flood‐plain alluvium in the Arkansas River valley near Great Bend, Kansas. Reflections were observed at depths of 0.63, 1.46, and 2.10 m and confirmed by finite‐difference wave‐equation modeling. The wavefield was densely sampled by placing geophones at 5‐cm intervals, and near‐source nonelastic deformation was minimized by using a very small seismic impulse source. For the reflections to be visible within this shallow range, low seismic P‐wave velocities (
ISSN:0094-8276
1944-8007
DOI:10.1029/1998GL900243