scholarly journals Shallow Seismic Surveys, Beaufort Sea

1974 ◽  
Author(s):  
J A M Hunter ◽  
R L Good
Keyword(s):  
Beaufort Sea ◽  
Seismic Surveys ◽  
Shallow Seismic

Shallow seismic surveys across the Ulsan fault near a province boundary in Korea

2003 ◽  
Author(s):  
K. Y. Kim ◽  
S. Y. Lee ◽  
D. H. Kim ◽  
H. C. Shin ◽  
Y. J. Kim ◽  
...  
Keyword(s):  
Seismic Surveys ◽  
Shallow Seismic

Detection of tunnels and boulders using shallow SH-SH reflected seismic waves

2019 ◽  
Vol 38 (6) ◽  
pp. 436-441 ◽  
Author(s):  
André J.-M. Pugin ◽  
Kevin Brewer ◽  
Timothy Cartwright ◽  
Steven L. Sargent
Keyword(s):  
Seismic Waves ◽  
Field Experiments ◽  
Sh Waves ◽  
Additional Advantage ◽  
Seismic Surveys ◽  
Shallow Seismic ◽  
Diffracted Waves ◽  
Seismic Sections ◽  
Ground Penetrating ◽  
Abandoned Coal Mine

We present three case studies on detecting buried glacial boulders, a sewage tunnel, and abandoned coal mine tunnels using shear-wave reflection methods. The seismic signature of such subsurface features is in the form of an isolated diffraction, distinctly recognized on seismic sections obtained from shallow seismic surveys using a transverse horizontal (H2) source and a multichannel landstreamer that consists of H2 geophones. We used H2 impulsive and vibrator sources with varying bandwidth. Based on field experiments with multicomponent recordings, we determined that the H2-H2 source-receiver configuration is the most optimal to generate downgoing horizontally polarized shear (SH) waves and upcoming SH reflected and diffracted waves. A shallow SH-SH image using a microvibe high-frequency sweep exhibits a wavelength between 1 and 2 m, which is comparable to that of a ground-penetrating radar image with the additional advantage of deeper penetration.

SEAL RESPONSES TO AIRGUN SOUNDS DURING SUMMER SEISMIC SURVEYS IN THE ALASKAN BEAUFORT SEA

2001 ◽  
Vol 17 (4) ◽  
pp. 795-812 ◽  
Author(s):  
Ross E. Harris ◽  
Gary W. Miller ◽  
W. John Richardson
Keyword(s):  
Beaufort Sea ◽  
Seismic Surveys

Determination of depths to an irregular interface in shallow seismic refraction surveys using a pocket calculator

Geophysics ◽  
1979 ◽  
Vol 44 (12) ◽  
pp. 1987-1998 ◽  
Author(s):  
David Cummings
Keyword(s):  
Seismic Refraction ◽  
Residual Soil ◽  
Rapid Reduction ◽  
Seismic Surveys ◽  
Shallow Seismic ◽  
Bedrock Surface ◽  
Reducing Costs ◽  
Irregular Interface ◽  
Adequate Data

Engineering geologic problems commonly involve the determination of depth to bedrock where it is overlain by residual soil or dry and saturated alluvium. The buried bedrock surface is commonly irregular and the nature of such irregularities must be known, for example, in (1) foundation studies where irregularities on the bedrock surface could indicate faults, or (2) groundwater studies where low areas in the bedrock may indicate channels for groundwater flow which may be targets for drilling. Seismic refraction surveys have proven to be a simple and accurate means of providing adequate data for describing irregularities on the bedrock surface, especially when the data are analyzed by the “plus‐minus” method of the wavefront approach. The method can be programmed readily for a Hewlett‐Packard HP-45 hand calculator, enabling rapid reduction of the data in the field. On‐site data reduction and interpretation result in greater efficiency by allowing immediate recognition of those areas where more detailed information may be needed, thereby precluding repeat surveys and reducing costs. For this purpose, suitable computer programs for the two‐ and three‐layer cases are developed, as well as programs for elevation and weathered zone corrections commonly needed in such shallow seismic surveys.

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