scholarly journals The Evolution of Shallow Seismic Exploration Methods

1995 ◽  
Vol 1 (A) ◽  
pp. 15-24 ◽  
Author(s):  
Don W. Steeples ◽  
Chris M. Schmeissner ◽  
Brian K. Macy
Keyword(s):  
Seismic Exploration ◽  
Shallow Seismic ◽  
Shallow Seismic Exploration

scholarly journals Exploration of Lintong-Chang’an Fault in relation to Lintong Kine of Rapid Rail Rransit in Xi’an city

2020 ◽  
Vol 198 ◽  
pp. 02004
Author(s):  
Fengwen Ren ◽  
Baolai Li ◽  
Jumei Bian ◽  
Chunfeng Li ◽  
Weixin Tian
Keyword(s):  
High Density ◽  
Seismic Exploration ◽  
Rail Transit ◽  
Shallow Seismic ◽  
Geological Disaster ◽  
Xi’An City ◽  
Shallow Seismic Exploration

In this paper, the method of combining high-density electrical exploration and shallow seismic exploration is used to explore the Lintong-chang ’an fault in relation to Lintong line of rapid rail transit in Xi’an city. The distribution and activity of the fault are determined, providing a basis for seismic fortification and seismic geological disaster evaluation in the line.

A SELF‐ADJUSTING FILTER FOR SHALLOW SEISMIC EXPLORATION

Geophysics ◽  
1966 ◽  
Vol 31 (2) ◽  
pp. 340-345 ◽  
Author(s):  
H. J. Meyerhoff
Keyword(s):  
Setting Time ◽  
Seismic Signal ◽  
Seismic Exploration ◽  
Linear Filtering ◽  
Variable Parameters ◽  
Signal Component ◽  
Shallow Seismic ◽  
Filter Output ◽  
Band Pass ◽  
Shallow Seismic Exploration

In shallow seismic exploration, signals from repeated impacts are recorded on a geophone. These records are synchronized and added to enhance the seismic signal component relative to the uncorrelated noise that impairs reception. Linear filtering is the technique proposed in this paper to improve seismic signal detection over and above that obtained by synchronous addition. To arrive at the practical filter which best (in mean square) approximates, at its output, the seismic signal component, when fed with the geophone record, requires at least two such repeated synchronized recordings. The filter network is composed of a set of band‐pass sections with variable parameters which are automatically adjusted to optimum. The setting time for the self‐adjusting procedure may be preselected; the longer the time to set, the greater the probable accuracy of the parameter settings. Once set to optimum, the filter is fed with the synchronized sum of geophone recordings. The resulting filter output is reversed in time and played back again through the same optimum filter to yield an output which has no phase distortion introduced by linear filtering. Such a filter is being incorporated into seismic and hydrosonde equipment.

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