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Toward the Autojuggie: Planting 72 geophones in 2 sec
Author(s) -
Steeples Don W.,
Baker G. S.,
Schmeissner C.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl900191
Subject(s) - geophone , geology , seismology , seismic wave , vertical seismic profile , line (geometry) , remote sensing , acoustics , physics , mathematics , geometry
Shallow seismic reflection surveys require dense spatial wave‐field sampling, contributing to their high cost. To assess the feasibility of planting geophones automatically, we planted 72 geophones in approximately 2 s in a test line, using an 11‐m‐wide farm tillage tool as a planting device. Geophones were attached rigidly, at 15 cm intervals, to five pieces of heavy‐duty channel iron bolted to the tillage‐tool frame. Conventional comparison‐line data collected about 75 cm away, parallel to the test line, were visually comparable with the seismic source 12 m distant. When the sources were placed 1 m from the geophones, a surface‐wave mode was excited by the channel iron and detected by geophones in both lines. This mode exhibited a different phase velocity than that of the desired seismic body‐waves and could be attenuated by frequency‐wavenumber filtering. These results suggest that automatic geophone placement is feasible and could decrease shallow seismic surveying costs.