A vertical seismic array method for shallow seismic refraction surveying of the sea floor

1988 ◽  
Author(s):  
J. A. Hunter ◽  
S. E. Pullan ◽  
M. A. Lockhard
Keyword(s):  
Seismic Refraction ◽  
Seismic Array ◽  
Sea Floor ◽  
Shallow Seismic

A vertical array method for shallow seismic refraction surveying of the sea floor

Geophysics ◽  
1990 ◽  
Vol 55 (1) ◽  
pp. 92-96 ◽  
Author(s):  
J. A. Hunter ◽  
S. E. Pullan
Keyword(s):  
Seismic Refraction ◽  
Research Interest ◽  
Seismic Velocities ◽  
Vertical Array ◽  
Sea Floor ◽  
Site Investigations ◽  
Shallow Seismic ◽  
Continental Shelves ◽  
Defense Research ◽  
Research Studies

In recent years, specific requirements of offshore geotechnical site investigations, as well as detailed defense research studies, have stimulated research interest in methods for measuring seismic velocities of sea‐floor sediments on the continental shelves. Investigations have used wide‐angie subbottom reflection measurements (McKay and McKay, 1982), bottom‐laid refraction cables (Hunter et al., 1979), and towed refraction arrays, both on the surface (Hunter and Hobson, 1974) and at depth (Fortin et al., 1987; Fagot, 1983).

A Measurement of Seismic Anistropy in the Northeast Pacific

1971 ◽  
Vol 8 (9) ◽  
pp. 1056-1064 ◽  
Author(s):  
C. E. Keen ◽  
D. L. Barrett
Keyword(s):  
Seismic Refraction ◽  
Maximum Velocity ◽  
Mean Value ◽  
Ocean Basin ◽  
P Wave ◽  
Sea Floor ◽  
P Wave Velocity ◽  
The Pacific ◽  
Magnetic Lineations ◽  
Sea Floor Spreading

A seismic refraction experiment was conducted in the Pacific Ocean basin, off the coast of British Columbia, Canada. The purpose of these measurements was to obtain an estimate of the anisotropy of the mantle P-wave velocity in the area and to relate this parameter to the direction of sea floor spreading. The results show that the crustal structure is similar to that measured elsewhere in the Pacific basin. Significant anisotropy of the mantle rocks is observed; the direction in which the maximum velocity occurs being 107° and the change of velocity, about 8% of the mean value, 8.07 km/s. The direction of maximum velocity does not coincide exactly with the direction of sea floor spreading, 090°, inferred from magnetic lineations.

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