scholarly journals Los Angeles Region Seismic Experiment (LARSE), California, off-shore seismic refraction data

1996 ◽  
Author(s):  
Uri S. ten Brink ◽  
R.M. Drury ◽  
G.K. Miller ◽  
T.M. Brocher ◽  
D.A. Okaya
Keyword(s):  
Los Angeles ◽  
Seismic Refraction ◽  
Seismic Experiment ◽  
Seismic Refraction Data ◽  
Refraction Data

An investigation into the time term method in refraction seismology

1970 ◽  
Vol 60 (1) ◽  
pp. 1-13
Author(s):  
Leon Reiter
Keyword(s):  
Seismic Refraction ◽  
Three Dimensional ◽  
Underlying Structure ◽  
Model Studies ◽  
Three Dimensional Representation ◽  
Seismic Experiment ◽  
Error Terms ◽  
Time Term ◽  
Seismic Refraction Data ◽  
Refraction Data

abstract The time term method of seismic refraction data analysis allows an areal arrangement of shot points and stations and yields directly a three-dimensional representation of underlying structure. This method was investigated analytically and through numerical experiments to determine implicit sources of error and to provide guidelines for its proper use. Error terms for computed refractor depths were derived for two site arrays over two structures, a simply dipping refractor surface and a symmetric anticlinal refractor surface. These error terms proved to be qualitatively reliable guides to the performance of the time term method using models of multi site arrays over planar and biplanar refractor structures. Neither continuity of time terms nor use of a known refractor velocity in the computations offered a guarantee of a more accurate refractor reconstruction. In the two models tested a refractor velocity greater than the true velocity yielded the best reconstruction. Sensitivity to angle of dip indicated preferred orientation of shot-station lines along gentle apparent dips when the underlying structure is known and their orientation along several azimuths when the structure is unknown so as to mute the effect of high dip angles. If the structure has refractor surfaces dipping more than a few degrees, the time term method will give inaccurate results unless previous knowledge of the refractor configuration permits model studies to determine error terms and arrangement of shots and stations. Unfortunately such knowledge is usually the goal of a seismic experiment.

scholarly journals Utilization of seismic refraction data for the study of structure of Bang hot-water source, Le Thuy, Quang Binh

2016 ◽  
Vol 38 (4) ◽  
Author(s):  
Tran Anh Vu* ◽  
Dinh Van Toan ◽  
Doan Van Tuyen ◽  
Lai Hop Phong ◽  
Duong Thi Ninh ◽  
...  
Keyword(s):  
Seismic Refraction ◽  
Water Source ◽  
Hot Water ◽  
Seismic Refraction Data ◽  
Refraction Data

scholarly journals Detailed shallow structure seismic refraction investigation, with the application of different processing techniques

2001 ◽  
Vol 34 (4) ◽  
pp. 1309
Author(s):  
Τ. ΠΑΠΑΔΟΠΟΥΛΟΣ ◽  
Π. ΚΑΜΠΟΥΡΗΣ ◽  
Ι. ΑΛΕΞΟΠΟΥΛΟΣ
Keyword(s):  
Seismic Velocity ◽  
Seismic Refraction ◽  
Seismic Sources ◽  
Subsurface Structure ◽  
Seismic Refraction Data ◽  
Processing Techniques ◽  
National Road ◽  
Gradual Variation ◽  
Refraction Data ◽  
Shallow Structure

A comparative study of conventional and modern processing techniques of seismic refraction data is examined in this paper, for shallow structure investigation in the framework of a geotechnical research. The techniques used here were applied for the detection of narrow and low seismic velocity zones along the bedrock in the 10.5th Km of the new national road Igoumenitsa-Ioannina. The results were comparable and only slight deviations were observed due mainly to different algorithm procedures applied on data and the resolution provided by each technique. It is pointed out that the non linear tomography seismic refraction technique, overcomes the conventional ones since by increasing the number of seismic sources and considering the gradual variation of seismic velocity with depth, a better resolution and image reconstruction for the subsurface structure is obtained.

Refrapy: A Python program for seismic refraction data analysis

2022 ◽  
Vol 159 ◽  
pp. 105020
Author(s):  
Victor José Cavalcanti Bezerra Guedes ◽  
Susanne Taina Ramalho Maciel ◽  
Marcelo Peres Rocha
Keyword(s):  
Data Analysis ◽  
Seismic Refraction ◽  
Seismic Refraction Data ◽  
Refraction Data
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